Vulnerability in Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery — CVE-2026-116563

What to do now

Update Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery to 4.5.5 or later.

Affected versions

• Everything up to and including 4.5.4

The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the site to have Shutter or Shutter Reloaded selected as the active lightbox, and the injected comment must be approved through WordPress's standard moderation workflow before the payload is rendered to other visitors.

This description is reproduced verbatim from the public vulnerability record.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/18dc9c01-c849-40c3-87ec-5eebc9660aff?source=api-prod

Part of this record comes from Wordfence Intelligence. Original: https://www.wordfence.com/threat-intel/vulnerabilities/id/18dc9c01-c849-40c3-87ec-5eebc9660aff
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This page is compiled automatically from public databases. Accuracy is not guaranteed; confirm against the vendor advisory before acting.