CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
What the vulnerability does
The STM Gallery 1.9 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'composicion' parameter in all versions up to, and including, 0.9 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.
Explanation of Vulnerability in Simple Terms
STM Gallery 1.9 and earlier contains a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning the impact can extend beyond the vulnerable component to affect other parts of a site or other users. An attacker with low-level credentials can inject code without user interaction.
What an attacker can do
Inject malicious scripts that execute in other users' browsers and affect site functionality.
Potential impact on your site
Authenticated users can inject scripts affecting other visitors or site operations; potential data theft or malware distribution.
Conditions required to exploit
Attacker must have a low-level user account on the site; no user interaction required.
Key dates
External resources
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