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PatchSiren cyber security CVE debrief

CVE-2026-12417 pravel CVE debrief

The SignUp & SignIn plugin for WordPress is vulnerable to Authentication Bypass via Weak Password Reset Validation leading to Account Takeover in versions up to, and including, 1.0.0. This vulnerability is due to the `pravel_change_password()` AJAX handler performing no nonce verification, no capability check, and only a loose equality check between an attacker-supplied `reset_activation_code` POST parameter and the target user's `forgot_email` user meta value. An attacker can exploit this by sending a crafted POST request to `admin-ajax.php` with `action=pravel_change_password`, `reset_user_id` set to the target account's user ID, and `new_password_custom` set to an attacker-chosen password. Successful exploitation allows the attacker to authenticate with the newly set password and fully take over the targeted account, achieving administrator-level privilege escalation on the affected site. The vulnerability has a CVSS score of 9.8 and is considered CRITICAL. WordPress users should immediately update the plugin to a patched version to prevent potential attacks.

Vendor
pravel
Product
SignUp & SignIn
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-24
Original CVE updated
2026-06-29
Advisory published
2026-06-24
Advisory updated
2026-06-29

Who should care

Administrators of WordPress sites using the SignUp & SignIn plugin, especially those with version 1.0.0 or earlier, should be aware of this critical vulnerability. Immediate action is required to update the plugin to a patched version to prevent potential account takeovers and administrator-level privilege escalation on their sites.

Technical summary

The vulnerability in the SignUp & SignIn plugin for WordPress is caused by the `pravel_change_password()` AJAX handler's lack of nonce verification, capability checks, and a loose equality check for the `reset_activation_code` POST parameter. This allows unauthenticated attackers to change the password of any WordPress user, including administrators, by sending a crafted POST request to `admin-ajax.php`. The vulnerability has a CVSS score of 9.8, indicating a high severity level. The CWE-640 weakness is associated with this vulnerability.

Defensive priority

High priority should be given to updating the SignUp & SignIn plugin to a patched version. Site administrators should verify that the plugin version is updated and monitor for any suspicious activity related to account changes or unauthorized access.

Recommended defensive actions

  • Update the SignUp & SignIn plugin to a patched version immediately.
  • Verify that the plugin version is updated and monitor for suspicious activity.
  • Implement additional security measures such as two-factor authentication.
  • Regularly review and update all plugins and themes on the WordPress site.
  • Monitor for any unauthorized account changes or access attempts.

Evidence notes

The vulnerability details are based on information from the CVE record and the NVD database. The CVE-2026-12417 record provides an overview of the vulnerability, while the NVD database offers additional details on the vulnerability's CVSS score and vector. The source item URL provides further information on the vulnerability from the Wordfence security team.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12417 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12417

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12417 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12417

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.