CVE-2026-91108 json
Alt Text AI <= 1.10.41 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Content Modification via atai_enrich_post_content AJAX Action
published 2026-10-03 37 d ago modified 2026-10-06 33 d ago also EUVD-2026-91918
- cvss
- 4.3
- 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 11%
- public exploits
- 0
- none known
Summary
The Alt Text AI – Automatically generate image alt text for SEO and accessibility plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.10.41. 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 post_content of any post or page on the site — including content they do not own — with LLM-generated text influenced by attacker-controlled keywords, enabling black-hat SEO manipulation and unauthorized consumption of the site owner's paid AltText.ai API credits. The nonce required to invoke the action is emitted on every admin page including /wp-admin/profile.php, which is accessible to Subscribers, making the nonce trivially obtainable by any authenticated user.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 36 d ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
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
- alttextai Alt Text AI – Automatically generate image alt text for SEO and accessibility
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/216e3087-52f1-4b2e-a31c-0c2ddf41aefb?source=cve
- plugins.trac.wordpress.org /browser/alttext-ai/tags/1.10.38/includes/class-atai-post.php#L275
- plugins.trac.wordpress.org /browser/alttext-ai/tags/1.10.38/includes/class-atai.php#L271
- plugins.trac.wordpress.org /browser/alttext-ai/tags/1.10.38/admin/class-atai-admin.php#L75
- plugins.trac.wordpress.org /changeset?reponame=&old=3723468%40alttext-ai&new=3723468%40alttext-ai
Sources
- CVE List CVE-2026-91108
- NVD CVE-2026-91108
Fencer Vulns 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.