{"id":"CVE-2011-4957","aliases":["DEBIAN-CVE-2011-4957","DSA-2470-1","EUVD-2011-4864","GHSA-mf9x-p929-vr83"],"status":"published","title":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not...","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03233,"percentile":0.8835,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2012-05-11T00:00:00Z","modified":"2026-10-23T17:47:47Z","fixes":[{"ecosystem":"Debian:12","package":"wordpress","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"wordpress","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"wordpress","fixed_in":["3.2.1+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"wordpress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.2+dfsg-1~squeeze1"}]}],"versions":["3.0.4+dfsg-1","3.0.5+dfsg-0+squeeze1","3.0.5+dfsg-1","3.2.1+dfsg-1","3.2.1+dfsg-2","3.2.1+dfsg-3","3.3+dfsg-1","3.3.1+dfsg-1"],"bundled":15}],"products":[{"vendor":"wordpress","product":"wordpress"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2012/04/19/17","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://secunia.com/advisories/44038","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://wordpress.org/news/2011/04/wordpress-3-1-1/","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://core.trac.wordpress.org/ticket/16892","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://secunia.com/advisories/49138","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2012/04/19/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.debian.org/security/2012/dsa-2470","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-4957"},{"url":"http://wordpress.org/news/2011/04/wordpress-3-1-1"},{"url":"https://github.com/advisories/GHSA-mf9x-p929-vr83"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-4957","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-4957","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2012-06-27T21:00:00Z","modified":"2024-09-17T03:44:06.481Z","updated_at":"2026-11-02T14:35:37.989579Z"}],"euvd":[{"id":"EUVD-2011-4864","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2012-06-27T21:00:00Z","modified":"2024-09-17T03:44:06Z","updated_at":"2026-11-03T00:28:29.042248Z"}],"ghsa":[{"id":"GHSA-mf9x-p929-vr83","title":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not...","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2022-05-17T05:28:04Z","modified":"2025-04-11T03:59:57Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:11.088321Z"}],"nvd":[{"id":"CVE-2011-4957","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2012-06-27T21:55:02.36Z","modified":"2026-06-16T23:35:43.377Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:12.272092Z"}],"osv":[{"id":"CVE-2011-4957","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2012-06-27T21:55:02Z","modified":"2026-04-10T03:42:08.465684Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-4957","description":"The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.","status":"published","published":"2012-06-27T21:55:02.36Z","modified":"2026-10-23T17:47:47.689350992Z","updated_at":"2026-11-02T15:45:24.92418Z"},{"id":"DSA-2470-1","title":"wordpress - several","status":"published","published":"2012-05-11T00:00:00Z","modified":"2026-03-09T01:19:24.881779Z","updated_at":"2026-11-02T15:46:15.489951Z"}]}}