XSS in Litespeed Cache
CVE-2026-113499
The LiteSpeed Cache WordPress plugin before 7.9.2 does not restrict one of its HTML rewriting routines to stylesheet content, so it removes a quote that terminates an attribute in the rendered page, and combined with unescaped comment author output this allows unauthenticated users whose comment is published to inject attributes that execute JavaScript in the browser of any visitor, including a logged-in administrator, who views front-end pages while the affected option is enabled.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Litespeed Cache
Weakness classification (CWE)
References
- wpscan.com/vulnerability/f04afdab-33fb-41a9-9270-908673998bb8/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-113499?
- CVE-2026-113499 is a high-severity vulnerability in Litespeed Cache, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2026-10-23.
- How severe is CVE-2026-113499?
- High severity. CVSS v3 base score is 7.5 out of 10.