{"id":"CVE-2025-52891","aliases":["BIT-modsecurity-2025-52891","BIT-modsecurity2-2025-52891","DEBIAN-CVE-2025-52891","EUVD-2025-19726","GHSA-gw9c-4wfm-vj3x","OESA-2025-1750","OESA-2025-1751","OESA-2025-1752","OESA-2025-1753","OESA-2025-1754","OESA-2025-1755","UBUNTU-CVE-2025-52891","openSUSE-SU-2025:15313-1"],"status":"published","title":"ModSecurity empty XML tag causes segmentation fault","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00382,"percentile":0.32445,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2025-07-02T15:03:34Z","modified":"2026-10-28T02:30:58Z","fixes":[{"ecosystem":"Bitnami","package":"modsecurity","fixed_in":["3.0.12"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"modsecurity2","fixed_in":["2.9.11"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"modsecurity-apache","fixed_in":["2.9.11-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"modsecurity-apache","fixed_in":["2.9.11-1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"mod_security","fixed_in":["2.9.11-1.oe2003sp4"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP3","package":"mod_security","fixed_in":["2.9.11-1.oe2203sp3"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"mod_security","fixed_in":["2.9.11-1.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS","package":"mod_security","fixed_in":["2.9.11-1.oe2403"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"mod_security","fixed_in":["2.9.11-1.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"apache2-mod_security2","fixed_in":["2.9.11-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"modsecurity","ranges":[{"type":"SEMVER","events":[{"introduced":"2.9.8"},{"fixed":"3.0.12"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"modsecurity2","ranges":[{"type":"SEMVER","events":[{"introduced":"2.9.8"},{"fixed":"2.9.11"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"modsecurity-apache","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"modsecurity-apache","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP2","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2403sp2"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2003sp4"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP3","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2203sp3"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2403"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"mod_security","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.oe2403sp1"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3-1","3.0.4-1","3.0.4-1build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4-2","3.0.6-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.10-1","3.0.11-1","3.0.12-1","3.0.12-1.1build1","3.0.12-1.1build2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.13-1","3.0.14-1","3.0.14-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.14-1build2","3.0.15-1","3.0.16-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"modsecurity","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.14-1build1","3.0.14-1build2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"apache2-mod_security2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-1.1"}]}]}],"products":[{"vendor":"owasp-modsecurity","product":"modsecurity"}],"references":[{"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-gw9c-4wfm-vj3x","tags":["x_refsource_CONFIRM","web","advisory","report"]},{"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/ecd7b9736836eee391d25f35d5bd06a3ce35a45d","tags":["x_refsource_MISC","web","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52891","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52891.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-52891","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1750","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48866","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1751","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1752","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1753","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1754","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1755","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-52891","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-52891","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-52891","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2025-52891","title":"ModSecurity empty XML tag causes segmentation fault","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:03:34.068Z","modified":"2025-07-02T15:27:34.504Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:31.631102Z"}],"euvd":[{"id":"EUVD-2025-19726","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:03:34Z","modified":"2025-07-02T15:27:34Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T20:32:14.284181Z"}],"nvd":[{"id":"CVE-2025-52891","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:15:27.177Z","modified":"2026-06-17T09:37:13.52Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:11:15.754475Z"}],"osv":[{"id":"CVE-2025-52891","title":"ModSecurity empty XML tag causes segmentation fault","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:03:34.068Z","modified":"2026-10-28T02:30:58.05303291Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:50.45326Z"},{"id":"DEBIAN-CVE-2025-52891","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:15:27.177Z","modified":"2026-09-01T20:05:53.677304776Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:47.378563Z"},{"id":"OESA-2025-1750","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity up to 2.9.9. It has been declared as critical.The manipulation of the argument sanitiseArg/sanitizeArg with an unknown input leads to a unknown weakness. The CWE definition for the vulnerability is CWE-1050. The product has a loop body or loop condition that contains a control element that directly or\n\t\t\t\t\tindirectly consumes platform resources, e.g. messaging, sessions, locks, or file\n\t\t\t\t\tdescriptors.As an impact it is known to affect availability.Upgrading to version 2.9.10 eliminates this vulnerability.(CVE-2025-48866)\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.683184914Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"OESA-2025-1751","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.553922462Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"OESA-2025-1752","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.699073805Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"OESA-2025-1753","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.938344132Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"OESA-2025-1754","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.483412768Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"OESA-2025-1755","title":"mod_security security update","description":"Security Fix(es):\n\nA vulnerability was found in OWASP ModSecurity 2.9.8/2.9.10 and classified as critical.Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Impacted is availability.Upgrading to version 2.9.11 eliminates this vulnerability.(CVE-2025-52891)","status":"published","published":"2025-07-11T11:08:50Z","modified":"2026-08-18T01:18:52.614239796Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"UBUNTU-CVE-2025-52891","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-02T15:15:00Z","modified":"2026-10-17T12:57:06.482185382Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:55:50.31802Z"},{"id":"BIT-modsecurity-2025-52891","title":"ModSecurity empty XML tag causes segmentation fault","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-04T07:41:54.07Z","modified":"2025-07-04T08:29:33.984344Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"BIT-modsecurity2-2025-52891","title":"ModSecurity empty XML tag causes segmentation fault","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.8 to before 2.9.11, an empty XML tag can cause a segmentation fault. If SecParseXmlIntoArgs is set to On or OnlyArgs, and the request type is application/xml, and at least one XML tag is empty (eg \u003cfoo\u003e\u003c/foo\u003e), then a segmentation fault occurs. This issue has been patched in version 2.9.11. A workaround involves setting SecParseXmlIntoArgs to Off.","status":"published","published":"2025-07-04T07:42:25.055Z","modified":"2025-07-04T08:29:33.984344Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"openSUSE-SU-2025:15313-1","title":"apache2-mod_security2-2.9.11-1.1 on GA media","description":"These are all security issues fixed in the apache2-mod_security2-2.9.11-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-07-06T00:00:00Z","modified":"2026-03-23T04:53:37.927992Z","updated_at":"2026-11-02T16:58:37.810934Z"}]}}