CVE-2026-4650: Auth Bypass (CVSS 5.3)

Description

The FundPress – WordPress Donation Plugin for WordPress is vulnerable to authorization bypass in versions up to and including 2.0.8. This is due to missing authorization and nonce verification in the donate_action_status() AJAX handler, which is registered to be accessible to unauthenticated users via wp_ajax_nopriv. The function only validates that the schema parameter equals 'donate-ajax' and that the required POST parameters are present, but fails to verify user capabilities, nonce tokens, or donation ownership. This makes it possible for unauthenticated attackers to modify the status of any donation by providing its ID (which are sequential integers and easily enumerable), allowing them to mark donations as completed, pending, cancelled, or any arbitrary status, potentially triggering email notifications and related side effects.

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CVSS v3.1 Score

5.3

MEDIUM

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

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://plugins.trac.wordpress.org/browser/fundpress/tags/2.0.8/inc/class-dn-ajax.php#L173 https://plugins.trac.wordpress.org/browser/fundpress/tags/2.0.8/inc/class-dn-ajax.php#L179 https://plugins.trac.wordpress.org/browser/fundpress/tags/2.0.8/inc/class-dn-donate.php#L189 https://plugins.trac.wordpress.org/browser/fundpress/tags/2.0.9/inc/class-dn-ajax.php#L179 https://plugins.trac.wordpress.org/browser/fundpress/trunk/inc/class-dn-ajax.php#L173 https://plugins.trac.wordpress.org/browser/fundpress/trunk/inc/class-dn-ajax.php#L179 https://plugins.trac.wordpress.org/browser/fundpress/trunk/inc/class-dn-donate.php#L189 https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3502937%40fundpress&new=3502937%40fundpress&sfp_email=&sfph_mail= https://www.wordfence.com/threat-intel/vulnerabilities/id/5db3c66f-0a9c-4233-923c-0965dec68c60?source=cve

Frequently Asked Questions

What is CVE-2026-4650? +

The FundPress – WordPress Donation Plugin for WordPress is vulnerable to authorization bypass in versions up to and including 2.0.8. This is due to missing authorization and nonce verification in the donate_action_status() AJAX handler, which is registered to be accessible to unauthenticated users via wp_ajax_nopriv. The function only validates that the schema parameter equals 'donate-ajax' and that the required POST parameters are present, but fails to verify user capabilities, nonce tokens, or donation ownership. This makes it possible for unauthenticated attackers to modify the status of any donation by providing its ID (which are sequential integers and easily enumerable), allowing them to mark donations as completed, pending, cancelled, or any arbitrary status, potentially triggering email notifications and related side effects. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-4650? +

CVE-2026-4650 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-4650? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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