CVE-2026-16587Advanced Form Integration <= 2.6.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary MailUp OAuth Token Overwrite via auth_redirect() Function
- 4.3MediumCVSS base score
- 0.39%Exploitation in 30 daysEPSS · top 67% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Wordfence
- 6 days later
· 6 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.39% · top 67% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
nasirahmed · Advanced Form Integration — Connect Forms to 200+ Apps
- affected ≤ 2.6.0
References
References6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/af913bb1-eff6-47cd-9471-f74bafda1e52?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L98 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L51 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L375 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L411 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3621411%40advanced-form-integration&new=3621411%40advanced-form-integration (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49695 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-16587)Record last updated .