CVE-2026-97637 json
JSON API Auth <= 3.1.2 - Unauthenticated Authentication Bypass via Cached 'generate_auth_cookie' Response
published 2026-10-02 38 d ago modified 2026-10-03 36 d ago also EUVD-2026-91259
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
The JSON API Auth plugin for WordPress is vulnerable to Authentication Bypass via Cached Session Cookie Disclosure in all versions up to, and including, 3.1.2. The vulnerability exists because the required PI-Media/json-api parent plugin caches controller dispatch results in transients keyed solely by URI and query string, ignoring HTTP method and POST body; this causes the `generate_auth_cookie()` endpoint — which embeds a live WordPress `logged_in` cookie produced by `wp_generate_auth_cookie()` directly in its JSON response body — to serve that cached authenticated response to any subsequent unauthenticated GET request to the same URI. This makes it possible for unauthenticated attackers to retrieve a valid Administrator `logged_in` session cookie from the cached response and use it to fully authenticate as the site Administrator, including via the same plugin's `get_currentuserinfo` endpoint and any cookie-authenticated controller action. Exploitation requires the PI-Media/json-api parent plugin to be installed and active with the Auth controller enabled, and a legitimate Administrator must have POSTed to `/api/auth/generate_auth_cookie/` within the preceding 24-hour cache TTL; the nominal HTTPS enforcement gate present in `Auth.php` is trivially bypassed by supplying `insecure=cool` as a request parameter.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 36 d ago
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- parorrey JSON API Auth
Classification
- Weakness
-
- CWE-287 Improper Authentication
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/f2fdf8bf-7f53-4579-9a1f-be7b3ef1ca50?source=cve
- plugins.trac.wordpress.org /browser/json-api-auth/tags/3.1.2/controllers/Auth.php#L66
- plugins.trac.wordpress.org /browser/json-api-auth/tags/3.1.2/controllers/Auth.php#L77
- plugins.trac.wordpress.org /browser/json-api-auth/tags/3.1.2/controllers/Auth.php#L28
- plugins.trac.wordpress.org /browser/json-api-auth/tags/3.1.2/json-api-auth.php#L65
- plugins.trac.wordpress.org /browser/json-api-auth/tags/3.1.2/controllers/Auth.php#L104
- plugins.trac.wordpress.org /changeset?reponame=&old=3712939%40json-api-auth&new=3712939%40json-api-auth
Sources
- CVE List CVE-2026-97637
- NVD CVE-2026-97637
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