CVE-2026-3129
LiteSpeed Cache <= 7.7 - Authenticated (Author+) Stored Cross-Site Scripting via img Tag Attributes
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | litespeedtech |
| Product | litespeed cache |
| Published | Aug 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
litespeedtech / LiteSpeed Cache
0 ≤ 7.7
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/c107674d-173f-49cf-b329-e7bffaee841d?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/media.cls.php#L761 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3473912/
Credits
stealthcopter