CVE-2026-116763: LiteSpeed Cache (WordPress plugin) · Cross-site Scripting
Affects LiteSpeed Cache (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 5.4 Medium.
Data as of 29 Oct 2026, 19:15 UTC
Thin evidence
One scorer or none| CNA (Wordfence) | CVSS 3.1 | 5.4 |
|---|
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| litespeedtechLiteSpeed Cache | Affected
| Fixed in– |
AI-suggested
Until a fix is available, it is recommended to disable the HTML Minify option (O_OPTM_HTML_MIN) to prevent exploitation. Additionally, review usage of companion plugins that render stored comment content in raw-text contexts such as JSON-LD script blocks and consider disabling or updating them.
Description
The LiteSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 7.9.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the HTML Minify option (O_OPTM_HTML_MIN) is enabled and a companion plugin renders stored comment content into a raw-text context such as a JSON-LD script block on the same page.
References
- wordfence.com/threat-intel/vulnerabilities/id/99f876e0-8f13-468b-b5fa-ca61e3cf57b4?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/optimize.cls.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/litespeed-cache/tags/7.9.1/src/optimizer.cls.php (opens in a new tab)
- plugins.trac.wordpress.org/changeset?reponame=&old=3757253%40litespeed-cache&new=3757253%40litespeed-cache (opens in a new tab)