CVE-2026-116761 json
CMB2 <= 2.13.4 - Unauthenticated Stored Cross-Site Scripting via Grouped WYSIWYG Field via Front-End Form
published 12d ago modified 12d ago also EUVD-2026-111602
- cvss
- 5.4
- 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 12%
- public exploits
- 0
- none known
Summary
The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cmb43ex1_grp[0][txt] (wysiwyg field inside group — field id controlled by integrator config)' parameter in all versions up to, and including, 2.13.4 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 is only exploitable when a site integrator renders the plugin's documented front-end form helper with a wysiwyg field inside a repeatable group on a publicly accessible page.
Patch / fix
- github.com/CMB2/CMB2@fbeb7c4 commit
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12d ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% 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
- jtsternberg CMB2
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- github.com /CMB2/CMB2/commit/fbeb7c4688dc5b8635a34978d837f1d458dcac44
- wordfence.com /threat-intel/vulnerabilities/id/97215367-08c0-46cc-a595-4475274a5a1c?source=cve
- plugins.trac.wordpress.org /browser/cmb2/tags/2.13.4/includes/CMB2_Field.php#L715
- plugins.trac.wordpress.org /browser/cmb2/tags/2.13.4/includes/types/CMB2_Type_Wysiwyg.php#L93
- plugins.trac.wordpress.org /browser/cmb2/tags/2.13.4/includes/helper-functions.php#L320
- plugins.trac.wordpress.org /browser/cmb2/tags/2.13.4/includes/CMB2_Sanitize.php#L447
- plugins.trac.wordpress.org /changeset/3767609/cmb2/trunk/includes/CMB2_Field.php
Sources
- CVE List CVE-2026-116761
- NVD CVE-2026-116761
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.