CVE-2026-16587 json
Advanced Form Integration <= 2.6.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary MailUp OAuth Token Overwrite via auth_redirect() Function
published 2026-07-28 3 mo ago modified 2026-07-28 3 mo ago also EUVD-2026-49695
- 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 32%
- public exploits
- 0
- none known
Summary
The Advanced Form Integration — Connect Forms to 200+ Apps plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.6.0. 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 site's stored MailUp OAuth tokens in the adfoin_mailup_keys option with attacker-controlled tokens, hijacking future form-submission data to a MailUp account they control or nulling the tokens to break the integration entirely. This is exploitable by any authenticated user who can reach /wp-admin/profile.php, as admin_init fires for all logged-in users visiting any wp-admin page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 32% 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
- nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/af913bb1-eff6-47cd-9471-f74bafda1e52?source=cve
- plugins.trac.wordpress.org /browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L98
- plugins.trac.wordpress.org /browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L51
- plugins.trac.wordpress.org /browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L375
- plugins.trac.wordpress.org /browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L411
- plugins.trac.wordpress.org /changeset?reponame=&old=3621411%40advanced-form-integration&new=3621411%40advanced-form-integration
Sources
- CVE List CVE-2026-16587
- NVD CVE-2026-16587
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