The WP Accessibility plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'alt' attribute of images processed by the "Long Description UI" feature in all versions up to, and including, 2.3.1. This is due to the plugin's JavaScript retrieving the alt attribute using getAttribute() and unsafely concatenating it into innerHTML and insertAdjacentHTML calls without proper sanitization or 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.
Exploitation requires the "Long Description UI" setting to be enabled and set to "Link to description."
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://plugins.trac.wordpress.org/browser/wp-accessibility/tags/2.3.1/js/wp-ac…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wp-accessibility/tags/2.3.1/js/wp-ac…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wp-accessibility/trunk/js/wp-accessi…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wp-accessibility/trunk/js/wp-accessi…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&ne…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/b08284ad-717f-4bdb-8e…
security@wordfence.com