Vulnerability Description
The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bbp_reply_content' parameter in all versions up to, and including, 7.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that an administrator has enabled Viewport Images (VPI) and configured a VPI filename that matches an image the attacker can embed in user-generated content — such as a bbPress topic where Subscriber-level Participants are permitted to post replies containing raw img tags.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/litespeedtech/lscache_wp/commit/0fc5f9ad69a138b8ee1fe2d07a5e9
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/media.
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/media.
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/utilit
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.2/src/media.
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8bf9b130-bb1e-43fc-b5c
FAQ
What is CVE-2026-109215?
CVE-2026-109215 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bbp_reply_content' parameter in all versions up to, and including, 7.9.1 due to insufficient input saniti...
How severe is CVE-2026-109215?
CVE-2026-109215 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-109215?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.