CVE-2026-116763 json
LiteSpeed Cache <= 7.9.1 - Unauthenticated Stored Cross-Site Scripting via HTML Minifier Predictable Placeholder (md5(REQUEST_TIME) + two-pass str_replace)
published 11d ago modified 11d ago also EUVD-2026-112690
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
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.
Is CVE-2026-116763 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11d ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- litespeedtech LiteSpeed Cache
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/99f876e0-8f13-468b-b5fa-ca61e3cf57b4?source=cve
- plugins.trac.wordpress.org /browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php#L103
- plugins.trac.wordpress.org /browser/litespeed-cache/tags/7.9.1/src/optimize.cls.php#L525
- plugins.trac.wordpress.org /browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php#L173
- plugins.trac.wordpress.org /browser/litespeed-cache/tags/7.9.1/lib/html-min.cls.php#L205
- plugins.trac.wordpress.org /browser/litespeed-cache/tags/7.9.1/src/optimizer.cls.php#L57
- plugins.trac.wordpress.org /changeset?reponame=&old=3757253%40litespeed-cache&new=3757253%40litespeed-cache
Sources
- CVE List CVE-2026-116763
- NVD CVE-2026-116763
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.