MSRXCVE-2026-109215
CVE-2026-109215
LiteSpeed Cache <= 7.9.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via VPI Image Attribute Re-Serialization
CVSS 3.1 · CNA · wordfence.com
chance of exploitation in the next 30 days (EPSS; higher than 26% of CVEs)
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.
Scores
Affected products
- litespeedtech LiteSpeed Cache: 0 to ≤ 7.9.1
Weakness: CWE-79
6 references (advisories, patches, write-ups)
- https://github.com/litespeedtech/lscache_wp/commit/0fc5f9ad69a138b8ee1fe2d07a5e9ac2574e1eb0
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/media.cls.php#L936
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/media.cls.php#L968
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/utility.cls.php#L299
- https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.2/src/media.cls.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8bf9b130-bb1e-43fc-b5c9-337646b8976e?source=cve
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.