CVE-2026-89138 json
Filter Gallery <= 1.1.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Modification via 'image_id' Parameter via ufg_save_gallery AJAX Action
published last mo. modified last mo. also EUVD-2026-82726
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
The Filter Gallery plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the title and content of arbitrary WordPress posts, write the _wp_attachment_image_alt meta key on arbitrary posts, and create or overwrite arbitrary ufg_gallery_* options.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- farazfrank Filter Gallery
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/73577a0d-8aac-4369-8022-98c198f79224?source=cve
- plugins.trac.wordpress.org /browser/filter-gallery/tags/1.1.4/filter-gallery.php#L843
- plugins.trac.wordpress.org /browser/filter-gallery/tags/1.1.4/filter-gallery.php#L884
- plugins.trac.wordpress.org /browser/filter-gallery/tags/1.1.4/filter-gallery.php#L845
- plugins.trac.wordpress.org /browser/filter-gallery/tags/1.1.4/filter-gallery.php#L885
- plugins.trac.wordpress.org /browser/filter-gallery/tags/1.1.4/filter-gallery.php#L902
- plugins.trac.wordpress.org /changeset?reponame=&old=3695415%40filter-gallery&new=3695415%40filter-gallery
Sources
- CVE List CVE-2026-89138
- NVD CVE-2026-89138
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.