CVE-2026-116522 json
Relevanssi <= 4.28.5 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Late Entity Decode
published 9d ago modified 7d ago also EUVD-2026-114599
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
The Relevanssi – A Better Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.28.5 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 requires the site to have both the comment indexing and comment highlighting options enabled, and the payload only fires when a visitor reaches a singular page via a Relevanssi search-result permalink carrying the highlight query parameter.
Patch / fix
Is CVE-2026-116522 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
- 8d ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- comesio Relevanssi – A Better Search
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- github.com /msaari/relevanssi/commit/b0324957b27e2dfc2aa116c96dcf578fbec9e0e5
- wordfence.com /threat-intel/vulnerabilities/id/442403ae-9011-4373-a363-e98e07ec7e9b?source=cve
- plugins.trac.wordpress.org /browser/relevanssi/tags/4.28.5/lib/excerpts-highlights.php#L521
- plugins.trac.wordpress.org /browser/relevanssi/tags/4.28.5/lib/excerpts-highlights.php#L688
- plugins.trac.wordpress.org /browser/relevanssi/tags/4.28.5/lib/excerpts-highlights.php#L1698
- plugins.trac.wordpress.org /browser/relevanssi/tags/4.28.5/lib/init.php#L140
- plugins.trac.wordpress.org /browser/relevanssi/tags/4.28.5/lib/common.php#L1037
- plugins.trac.wordpress.org /changeset?reponame=&new=3767703%40relevanssi%2Ftags%2F4.28.6&old=3761637%40relevanssi%2Ftags%2F4.28.5
Sources
- CVE List CVE-2026-116522
- NVD CVE-2026-116522
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