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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.012 (69.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000
Affected products
- Litespeedtech Litespeed Cache
- Litespeed Cache — versions 4.4.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc (Exploit, Third Party Advisory)
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.