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CVE-2023-4372

29
FAUCET Score

CVE-2023-4372 describes a Stored Cross-Site Scripting (XSS) vulnerability in the LiteSpeed Cache plugin for WordPress, affecting versions up to and including 5.6. Authenticated attackers with contributor-level permissions or higher can inject malicious web scripts through the 'esi' shortcode due to insufficient input sanitization. This medium-severity vulnerability (CVSS 5.4) allows for client-side script execution when a user accesses an affected page, potentially leading to information disclosure or session hijacking. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion, with one Reddit mention incorrectly stating it as unauthenticated.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 5.6CPE match
cpe:2.3:a:litespeedtech:litespeed_cache:*:*:*:*:*:wordpress:*:*
<= 5.6CPE matchmatch criteria
cpe:2.3:a:litespeedtech:litespeed_cache:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
19.68%
Probability of exploitation in next 30 days
EPSS Percentile
97.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1968 is in the 99th percentile among its peer group of 15,222 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / litespeedtech/lscache_wp/commit/95a407d9f192b37ac6cf96d2aa50f240e3e6b2d7
Patch
plugins.trac.wordpress.org / browser/litespeed-cache/tags/5.5.1/src/esi.cls.php
Issue Tracking
plugins.trac.wordpress.org / changeset/2977143/litespeed-cache
Patch
wordfence.com / threat-intel/vulnerabilities/id/27026f0f-c85e-4409-9973-4b9cb8a90da5
Third Party Advisory