← Vulnerability feed

Vulnerability record · CVE-2021-24963 · published 3 January 2022

CVE-2021-24963: Litespeedtech litespeed cache cross-site scripting vulnerability

Litespeedtech · Litespeed Cache

The LiteSpeed Cache WordPress plugin before 4.4.4 does not escape the qc_res parameter before outputting it back in the JS code of an admin page, leading to a Reflected Cross-Site Scripting

4.8 CVSS 3.1 Medium EPSS 0.65% · top 50.7% CWE-79 · Cross-site scripting
4.8CVSS 3.1 base score, v2 3.5
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The LiteSpeed Cache WordPress plugin before 4.4.4 does not escape the qc_res parameter before outputting it back in the JS code of an admin page, leading to a Reflected Cross-Site Scripting

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://plugins.trac.wordpress.org/changeset/2634373 PatchThird Party Advisory
https://wpscan.com/vulnerability/7f8b4275-7586-4e04-afd9-d12bdab6ba9b ExploitThird Party Advisory
https://plugins.trac.wordpress.org/changeset/2634373 PatchThird Party Advisory
https://wpscan.com/vulnerability/7f8b4275-7586-4e04-afd9-d12bdab6ba9b ExploitThird Party Advisory

Track CVE-2021-24963 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-50550Litespeedtech litespeed cache inadequate encryption strength vulnerabilityIncorrect Privilege Assignment vulnerability in LiteSpeed Technologies LiteSpeed Cache litespeed-cache allows Privilege Escalation.This issue affects…EPSS 0.90%9.8CVE-2024-44000LiteSpeed Cache WordPress plugin authentication bypass via exposed credentialsLiteSpeed Cache versions before 6.5.0.1 contain an insufficiently protected credentials flaw (CWE-522) that allows authentication bypass. The referen…EPSS 82%analysed9.8CVE-2024-28000LiteSpeed Cache unauthenticated privilege escalation via weak hashLiteSpeed Cache for WordPress, up to version 6.3.0.1, assigns privileges incorrectly (CWE-266), allowing an unauthenticated attacker to escalate to a…EPSS 68%analysed8.8CVE-2024-47637Litespeedtech litespeed cache relative path traversal vulnerabilityRelative Path Traversal vulnerability in LiteSpeed Technologies LiteSpeed Cache litespeed-cache allows Path Traversal.This issue affects LiteSpeed Ca…EPSS 0.65%8.8CVE-2022-46800Litespeedtech litespeed cache cross-site request forgery vulnerabilityCross-Site Request Forgery (CSRF) vulnerability in LiteSpeed Technologies LiteSpeed Cache plugin <= 5.3 versions.EPSS 0.26%6.1CVE-2024-47374Litespeedtech litespeed cache cross-site scripting vulnerabilityImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LiteSpeed Technologies LiteSpeed Cache litespee…EPSS 1.4%6.1CVE-2023-40000LiteSpeed Cache unauthenticated stored XSS via web page generationLiteSpeed Cache, a WordPress plugin, fails to neutralize input during web page generation, allowing stored cross-site scripting in versions up to and…EPSS 55%analysed6.1CVE-2021-24964Litespeedtech litespeed cache cross-site scripting vulnerabilityThe LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to ma…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2021-24963), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.