CVE-2026-16587: CWE-862 Missing Authorization in nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps
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.
AI Analysis
Technical Summary
CVE-2026-16587 is an authorization bypass vulnerability (CWE-862) in the nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps WordPress plugin. The plugin fails to verify that a user is authorized to perform actions that modify the adfoin_mailup_keys option, which stores MailUp OAuth tokens. As a result, any authenticated user with subscriber-level privileges or higher who can access /wp-admin/profile.php can overwrite these tokens with attacker-controlled values. This enables attackers to hijack future form-submission data sent to MailUp or nullify the tokens, breaking the integration. The vulnerability affects all plugin versions up to and including 2.6.0. No official patch or remediation guidance is currently available.
Potential Impact
An attacker with subscriber-level access or higher can overwrite stored MailUp OAuth tokens, allowing them to redirect form-submission data to a MailUp account they control or disable the integration by nullifying tokens. This compromises the integrity of data sent via forms but does not impact confidentiality or availability directly. The vulnerability requires authenticated access and does not involve user interaction beyond visiting an admin page.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict subscriber-level user access where possible and monitor for unauthorized changes to the adfoin_mailup_keys option. Consider disabling or restricting access to the affected plugin if feasible.
CVE-2026-16587: CWE-862 Missing Authorization in nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps
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.
CVSS v3.1
Score 4.3medium
Affected software
nasirahmed
Advanced Form Integration — Connect Forms to 200+ Apps
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16587 is an authorization bypass vulnerability (CWE-862) in the nasirahmed Advanced Form Integration — Connect Forms to 200+ Apps WordPress plugin. The plugin fails to verify that a user is authorized to perform actions that modify the adfoin_mailup_keys option, which stores MailUp OAuth tokens. As a result, any authenticated user with subscriber-level privileges or higher who can access /wp-admin/profile.php can overwrite these tokens with attacker-controlled values. This enables attackers to hijack future form-submission data sent to MailUp or nullify the tokens, breaking the integration. The vulnerability affects all plugin versions up to and including 2.6.0. No official patch or remediation guidance is currently available.
Potential Impact
An attacker with subscriber-level access or higher can overwrite stored MailUp OAuth tokens, allowing them to redirect form-submission data to a MailUp account they control or disable the integration by nullifying tokens. This compromises the integrity of data sent via forms but does not impact confidentiality or availability directly. The vulnerability requires authenticated access and does not involve user interaction beyond visiting an admin page.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict subscriber-level user access where possible and monitor for unauthorized changes to the adfoin_mailup_keys option. Consider disabling or restricting access to the affected plugin if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-22T13:47:06.150Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a684e329c2644c7f825a826
Added to database: 07/28/2026, 06:37:38 UTC
Last enriched: 07/29/2026, 23:42:01 UTC
Last updated: 09/11/2026, 22:06:31 UTC
Views: 76
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