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.
Published: 2026-08-28
Score: 6.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 28 Aug 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Litespeedtech
Litespeedtech litespeed Cache
Wordpress
Wordpress wordpress
Vendors & Products Litespeedtech
Litespeedtech litespeed Cache
Wordpress
Wordpress wordpress

Fri, 28 Aug 2026 05:00:00 +0000

Type Values Removed Values Added
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.
Title LiteSpeed Cache <= 7.7 - Authenticated (Author+) Stored Cross-Site Scripting via img Tag Attributes
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Litespeedtech Litespeed Cache
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-08-28T18:35:56.321Z

Reserved: 2026-02-24T16:38:54.193Z

Link: CVE-2026-3129

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-08-28T05:16:42.200

Modified: 2026-08-28T15:09:00.790

Link: CVE-2026-3129

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T15:30:08Z

Weaknesses
  • CWE-79

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