LiteSpeed Cache <= 5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 20%
exploitation probability
20%top 3% of all CVEs
observed exploitation
nono source reports it
The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'esi' shortcode in versions up to, and including, 5.6 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products
litespeedtech · LiteSpeed CacheReferences
https://github.com/litespeedtech/lscache_wp/commit/95a407d9f192b37ac6cf96d2aa50f240e3e6b2d7#diff-7b2c514b58d1b8a71655607bdfab87cedb013bc1b8927ce0b49a89ddf4a7e01cR495https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/5.5.1/src/esi.cls.php#L480https://plugins.trac.wordpress.org/changeset/2977143/litespeed-cache#file348https://www.wordfence.com/threat-intel/vulnerabilities/id/27026f0f-c85e-4409-9973-4b9cb8a90da5?source=cve