Stored XSS via unsanitized Viewport Images mutation
Published Feb 20, 2026 · Updated Feb 20, 2026
Stored XSS in LiteSpeed Cache for WordPress 6.5.2 and earlier allows remote authenticated users to inject JavaScript into posts. Viewport Images processing applies an Editor-supplied DOM mutation from per-post LiteSpeed Options without neutralizing embedded script content. Exploitation requires Editor access, post-creation and LiteSpeed Options permissions, Lazy Load Images and Viewport Images enabled, and Optimize for Guests Only disabled; the script runs when another user visits the post.
Summary
What happened
Stored XSS in LiteSpeed Cache for WordPress 6.5.2 and earlier allows remote authenticated users to inject JavaScript into posts. Viewport Images processing applies an Editor-supplied DOM mutation from per-post LiteSpeed Options without neutralizing embedded script content. Exploitation requires Editor access, post-creation and LiteSpeed Options permissions, Lazy Load Images and Viewport Images enabled, and Optimize for Guests Only disabled; the script runs when another user visits the post.
The record
- CVE
- CVE-2024-51915
- Published
- Feb 20, 2026
- Updated
- Feb 20, 2026
- Vendor
- LiteSpeed Technologies
- Product
- LiteSpeed Cache for WordPress
- Classifications
- CWE-79, CAPEC-592, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 20, 2026CVE publishedPublication date reported by the CVE source.
- Feb 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=<= 6.5.2 changes=[{"at":"6.5.3","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo