Description
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` 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
litespeedtech LiteSpeed Cache
Default version status: unaffected
0 to ≤ 7.7affected
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c107674d-173f-49cf-b329-e7bffaee841d?source=cve ↗
- https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/media.cls.php#L761 ↗
- https://plugins.trac.wordpress.org/changeset/3473912/ ↗
- https://blog.litespeedtech.com/2026/08/27/security-update-for-lscwp-cve-2026-3129/ ↗