XSS in Litespeedtech Litespeed Cache
CVE-2021-24963
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
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · 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/7f8b4275-7586-4e04-afd9-d12bdab6ba9b (Exploit, Third Party Advisory)
- plugins.trac.wordpress.org/changeset/2634373 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24963?
- CVE-2021-24963 is a medium-severity vulnerability in Litespeedtech Litespeed Cache, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-01-03.
- How severe is CVE-2021-24963?
- Medium severity. CVSS v3 base score is 4.8 out of 10.
- Is CVE-2021-24963 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.