XSS in Dfactory Responsive Lightbox & Gallery
CVE-2026-103897
The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.7.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the plugin's 'Comments' lightbox setting to be enabled (disabled by default), a moderator to approve the injected comment, and a site visitor to click the affected image to open the lightbox.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/5bb2a893-d254-42bc-8b50-2a883…
- plugins.trac.wordpress.org/browser/responsive-lightbox/tags/2.7.9/includes/clas…
- plugins.trac.wordpress.org/browser/responsive-lightbox/tags/2.7.9/includes/clas…
- plugins.trac.wordpress.org/browser/responsive-lightbox/tags/2.7.9/includes/clas…
- plugins.trac.wordpress.org/browser/responsive-lightbox/tags/2.7.9/includes/clas…
- plugins.trac.wordpress.org/browser/responsive-lightbox/tags/2.7.9/assets/glight…
- plugins.trac.wordpress.org/changeset/3729072
- plugins.trac.wordpress.org/changeset/3694843/responsive-lightbox/trunk/includes…
Frequently asked questions
- What is CVE-2026-103897?
- CVE-2026-103897 is a medium-severity vulnerability in Dfactory Responsive Lightbox & Gallery, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-10-10.
- How severe is CVE-2026-103897?
- Medium severity. CVSS v3 base score is 4.4 out of 10.