What is CVE-2021-24964?

CVE-2021-24964 is a medium-severity vulnerability in Litespeedtech Litespeed Cache, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-03.

How severe is CVE-2021-24964?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-24964 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Litespeedtech Litespeed Cache

CVE-2021-24964

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.012 (67.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Litespeedtech Litespeed_cache
Unknown Litespeed Cache — versions 4.4.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-24964?: CVE-2021-24964 is a medium-severity vulnerability in Litespeedtech Litespeed Cache, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-03.
How severe is CVE-2021-24964?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-24964 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.