CVE-2026-3129

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.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://blog.litespeedtech.com/2026/08/27/security-update-for-lscwp-cve-2026-3129/
https://plugins.trac.wordpress.org/browser/litespeed-cache/trunk/src/media.cls.php#L761
https://plugins.trac.wordpress.org/changeset/3473912/
https://www.wordfence.com/threat-intel/vulnerabilities/id/c107674d-173f-49cf-b329-e7bffaee841d?source=cve

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 05:16

Updated : 2026-08-29 00:16

NVD link : CVE-2026-3129

Mitre link : CVE-2026-3129

CVE.ORG link : CVE-2026-3129

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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