CVE-2023-4372

MEDIUM

LiteSpeed Cache < 5.6 - Authenticated Stored Cross-Site Scripting via ESI Shortcode

Title source: llm

Description

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.

References (4)

Core 4

Core References

Patch

https://github.com/litespeedtech/lscache_wp/commit/95a407d9f192b37ac6cf96d2aa50f240e3e6b2d7#diff-7b2c514b58d1b8a71655607bdfab87cedb013bc1b8927ce0b49a89ddf4a7e01cR495

View Patch ZIP pw:eip

Issue Tracking

https://plugins.trac.wordpress.org/browser/litespeed-cache/tags/5.5.1/src/esi.cls.php#L480

Patch

https://plugins.trac.wordpress.org/changeset/2977143/litespeed-cache#file348

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/27026f0f-c85e-4409-9973-4b9cb8a90da5?source=cve

Scores

CVSS v3 6.4

EPSS 0.1968

EPSS Percentile 97.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

litespeedtech/LiteSpeed Cache < 5.6

litespeedtech/litespeed_cache < 5.6

Published Jan 11, 2024

Tracked Since Feb 18, 2026