{"id":"CVE-2026-3129","aliases":["EUVD-2026-67407","GHSA-g9h6-rmm3-xq5v"],"status":"published","title":"LiteSpeed Cache \u003c= 7.7 - Authenticated (Author+) Stored Cross-Site Scripting via img Tag Attributes","description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `\u003cimg\u003e` tag attributes in all versions up to, and including, 7.7. This is due to a flawed regular expression that is used to strip `width` and `height` attributes from images when the \"Lazy Load Images\" and \"Add Missing Sizes\" features are enabled. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that execute whenever a user accesses an injected page.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00331,"percentile":0.26528,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-08-28T03:39:35Z","modified":"2026-08-29T00:30:58Z","products":[{"vendor":"litespeedtech","product":"litespeed cache"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c107674d-173f-49cf-b329-e7bffaee841d?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/media.cls.php#L761"},{"url":"https://plugins.trac.wordpress.org/changeset/3473912/"},{"url":"https://blog.litespeedtech.com/2026/08/27/security-update-for-lscwp-cve-2026-3129/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3129"},{"url":"https://plugins.trac.wordpress.org/changeset/3473912"},{"url":"https://blog.litespeedtech.com/2026/08/27/security-update-for-lscwp-cve-2026-3129"},{"url":"https://github.com/advisories/GHSA-g9h6-rmm3-xq5v"}],"sources":{"cve":[{"id":"CVE-2026-3129","title":"LiteSpeed Cache \u003c= 7.7 - Authenticated (Author+) Stored Cross-Site Scripting via img Tag Attributes","description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `\u003cimg\u003e` tag attributes in all versions up to, and including, 7.7. This is due to a flawed regular expression that is used to strip `width` and `height` attributes from images when the \"Lazy Load Images\" and \"Add Missing Sizes\" features are enabled. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that execute whenever a user accesses an injected page.","status":"published","published":"2026-08-28T03:39:35.416Z","modified":"2026-08-28T23:18:59.081Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:48:58.05327Z"}],"euvd":[{"id":"EUVD-2026-67407","description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `\u003cimg\u003e` tag attributes in all versions up to, and including, 7.7. This is due to a flawed regular expression that is used to strip `width` and `height` attributes from images when the \"Lazy Load Images\" and \"Add Missing Sizes\" features are enabled. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that execute whenever a user accesses an injected page.","status":"published","published":"2026-08-28T03:39:35Z","modified":"2026-08-28T23:18:59Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:01:21.947009Z"}],"ghsa":[{"id":"GHSA-g9h6-rmm3-xq5v","title":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted...","description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `\u003cimg\u003e` tag attributes in all versions up to, and including, 7.7. This is due to a flawed regular expression that is used to strip `width` and `height` attributes from images when the \"Lazy Load Images\" and \"Add Missing Sizes\" features are enabled. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that execute whenever a user accesses an injected page.","status":"published","published":"2026-08-28T06:31:04Z","modified":"2026-08-29T00:30:58Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:11:08.705354Z"}],"nvd":[{"id":"CVE-2026-3129","description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `\u003cimg\u003e` tag attributes in all versions up to, and including, 7.7. This is due to a flawed regular expression that is used to strip `width` and `height` attributes from images when the \"Lazy Load Images\" and \"Add Missing Sizes\" features are enabled. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that execute whenever a user accesses an injected page.","status":"published","published":"2026-08-28T05:16:42.2Z","modified":"2026-08-29T00:16:37.263Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:42.035353Z"}]}}