Stored Cross-Site Scripting in LiteSpeed Cache Plugin for WordPress
CVE-2026-109215

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Litespeed Cache
Vendor
CVE Published:
29 October 2026

What is CVE-2026-109215?

The LiteSpeed Cache plugin for WordPress has a vulnerability that permits Stored Cross-Site Scripting via the 'bbp_reply_content' parameter. This issue arises due to a lack of proper input sanitization and output escaping, allowing authenticated attackers with subscriber-level access to inject arbitrary web scripts. Exploiting this vulnerability requires that the administrator has enabled Viewport Images (VPI) and has set a VPI filename corresponding to a user-generated content image. Attackers can exploit this vulnerability in bbPress topics where Subscribers can post replies that contain raw image tags, thus executing malicious scripts whenever users access the compromised pages.

Affected Version(s)

LiteSpeed Cache 0 <= 7.9.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/litespeed-cach...
https://plugins.trac.wordpress.org/browser/litespeed-cach...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Adrien Brunner
.