{"id":"CVE-2026-3129","title":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `<img>` tag attributes in all versions up to, and including, 7.7","summary":"The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `<img>` 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` …","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-08-28","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-3129","references":[{"url":"https://blog.litespeedtech.com/2026/08/27/security-update-for-lscwp-cve-2026-3129/","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/media.cls.php#L761","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3473912/","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c107674d-173f-49cf-b329-e7bffaee841d?source=cve","label":"security@wordfence.com"}],"tags":["nvd"],"epss":0.00193,"epssPercentile":0.0926,"ingestedAt":"2026-08-29T21:42:36.732Z","slug":"CVE-2026-3129","body":"## Overview\n\nThe LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted `<img>` 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}