TI-2021-07243 Aliases CVE-2021-24964 GHSA-fg4h-vrcg-56rq

LiteSpeed Cache < 4.4.4 - IP Check Bypass to Unauthenticated Stored XSS

MEDIUM 60CWE-79Published 2022-01-03 · Updated 2025-05-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01236 69th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed LiteSpeed Cache (Unknown): 4.4.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	LiteSpeed Cache	4.4.4 to before 4.4.4	4.4.4	Patch available	CNA

LiteSpeed Cache VendorUnknown Affected 4.4.4 to before 4.4.4 Fixed in 4.4.4 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:litespeedtech:litespeed_cache::::::wordpress::*	before 4.4.4	Vulnerable	litespeedtech

cpe:2.3:a:litespeedtech:litespeed_cache:*:*:*:*:*:wordpress:*:* Versions before 4.4.4 Vulnerable ·litespeedtech

Remediation

Fix · CNA LiteSpeed Cache (Unknown) Fixed in 4.4.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2022-01-03
LiteSpeed Cache 4.4.4
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2021-07242 LiteSpeed Cache < 4.4.4 - Admin+ Reflected Cross-Site ScriptingPriority LOW 23
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2021-24964
2026-10-03 Alias added: GHSA-fg4h-vrcg-56rq

References

Exploit 1

https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc

TI-2024-29589 WordPress LiteSpeed Cache plugin < 6.5.0.1 - Unauthenticated Account Takeover via Cookie Leak vulnerability CVSS 3.1CRITICAL 9.8
TI-2024-18601 WordPress LiteSpeed Cache plugin <= 6.3.0.1 - Unauthenticated Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
TI-2023-20892 WordPress LiteSpeed Cache plugin <= 5.7 - Unauthenticated Site Wide Stored XSS vulnerability CVSS 3.1HIGH 8.3
TI-2023-04040 LiteSpeed Cache <= 5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVSS 3.1MEDIUM 6.4
TI-2024-33979 WordPress LiteSpeed Cache plugin <= 6.5.1 - Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
TI-2023-24061 WordPress LiteSpeed Cache plugin <= 5.7 - Unauthenticated Broken Access Control on API vulnerability CVSS 3.1HIGH 8.2

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences