CVE-2026-5340

Description

The Fancy Image Show plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `fancy-img-show` shortcode in all versions up to, and including, 9.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

PUBLISHED Reserved 2026-04-01 | Published 2026-05-12 | Updated 2026-05-12 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Djaidja Moundjid finder

References

www.wordfence.com/...-4e87-4137-a5df-2b74db1e9ae8?source=cve

plugins.trac.wordpress.org/...how/trunk/fancy-image-show.php

plugins.trac.wordpress.org/.../tags/9.1/fancy-image-show.php

plugins.trac.wordpress.org/.../tags/9.1/fancy-image-show.php

cve.org (CVE-2026-5340)

nvd.nist.gov (CVE-2026-5340)

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