Advanced Form Integration <= 2.6.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary MailUp OAuth Token Overwrite via auth_redirect() Function

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16587
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-28 07:16:42 UTC
Updated2026-07-28 16:17:32 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.002220000 probability, percentile 0.128700000 (date 2026-07-29)

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nasirahmed Advanced Form Integration Connect Forms To 200 Apps affected 2.6.0 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/af913bb1-eff6-47cd-9471-f74ba... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Wordfence PRISM (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-22T14:02:53.000ZVendor Notified
CNA2026-07-27T16:35:52.000ZDisclosed

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