CVE-2026-6642: XSS (CVSS 6.4)

Description

The Media Library Assistant plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the bulk edit preset export/import mechanism in versions up to and including 3.35. This is due to insufficient output escaping on preset field values when they are rendered in HTML attribute contexts in the mla_generate_bulk_edit_form_fieldsets() function and mla-bulk-edit-fieldsets.tpl template. While wp_kses() filtering is applied during preset export for users without unfiltered_html capability, this does not prevent attribute injection attacks since the malicious payload consists of quotes and HTML attributes rather than HTML tags. When preset values are retrieved and rendered, they are directly assigned to template variables without esc_attr() escaping and then inserted into input element value attributes via simple string replacement. This makes it possible for authenticated attackers, with Author-level access and above (upload_files capability), to inject arbitrary web scripts that execute when an administrator imports the poisoned preset and the targeted input field receives focus.

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CVSS v3.1 Score

6.4

MEDIUM

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

EPSS — Exploit Prediction

0.0022

Probability of exploitation

0.12%

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-79 Cross-site Scripting (XSS)

References

Other References

https://plugins.trac.wordpress.org/browser/media-library-assistant/tags/3.35/includes/class-mla-ajax.php#L395 https://plugins.trac.wordpress.org/browser/media-library-assistant/tags/3.35/includes/class-mla-edit-media.php#L647-L651 https://plugins.trac.wordpress.org/browser/media-library-assistant/tags/3.35/tpls/mla-bulk-edit-fieldsets.tpl#L70 https://plugins.trac.wordpress.org/browser/media-library-assistant/trunk/includes/class-mla-ajax.php#L395 https://plugins.trac.wordpress.org/browser/media-library-assistant/trunk/includes/class-mla-edit-media.php#L647-L651 https://plugins.trac.wordpress.org/browser/media-library-assistant/trunk/tpls/mla-bulk-edit-fieldsets.tpl#L70 https://plugins.trac.wordpress.org/changeset/3512155/ https://www.wordfence.com/threat-intel/vulnerabilities/id/6e45dc8a-b777-4a49-b1b1-c59ffa75f5b4?source=cve

Frequently Asked Questions

What is CVE-2026-6642? +

The Media Library Assistant plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the bulk edit preset export/import mechanism in versions up to and including 3.35. This is due to insufficient output escaping on preset field values when they are rendered in HTML attribute contexts in the mla_generate_bulk_edit_form_fieldsets() function and mla-bulk-edit-fieldsets.tpl template. While wp_kses() filtering is applied during preset export for users without unfiltered_html capability, this does not prevent attribute injection attacks since the malicious payload consists of quotes and HTML attributes rather than HTML tags. When preset values are retrieved and rendered, they are directly assigned to template variables without esc_attr() escaping and then inserted into input element value attributes via simple string replacement. This makes it possible for authenticated attackers, with Author-level access and above (upload_files capability), to inject arbitrary web scripts that execute when an administrator imports the poisoned preset and the targeted input field receives focus. It has a CVSS v3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2026-6642? +

CVE-2026-6642 has a CVSS v3.1 score of 6.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0022, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-6642? +

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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