Vulnerability · Published May 27, 2026 · Assigned by Wordfence
CVE-2026-8873Content Slideshow <= 2.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Medium 6.4
In plain English
A medium-severity cross-site scripting in Content Slideshow from celloexpressions. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Official description
The Content Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 2.4.1 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| celloexpressions | Content Slideshow | 0 – through 2.4.1 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9548f647-9fcb-481c-874e-0184609283fe?source=cve
- https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L143
- https://plugins.trac.wordpress.org/browser/content-slideshow/tags/2.4.1/slideshow-widget-shortcode.php#L14