CVE-2026-4379 json
LightPress Lightbox <= 2.3.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'group' Shortcode Attribute
published 2026-04-08 7 mo ago modified 2026-07-25 3 mo ago also EUVD-2026-20034
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
The LightPress Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `group` attribute in the `[gallery]` shortcode in all versions up to, and including, 2.3.4. This is due to the plugin modifying gallery shortcode output to include the `group` attribute value without proper 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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- firelightwp LightPress Lightbox
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/2bed4818-70c5-40b7-8d8d-f43f3baa0f3d?source=cve
- plugins.trac.wordpress.org /browser/wp-jquery-lightbox/tags/2.3.4/lightboxes/wp-jquery-lightbox/class-wp-jquery-lightbox.php#L395
- plugins.trac.wordpress.org /browser/wp-jquery-lightbox/tags/2.3.4/lightboxes/wp-jquery-lightbox/class-wp-jquery-lightbox.php#L376
- plugins.trac.wordpress.org /changeset?old_path=/wp-jquery-lightbox/tags/2.3.4&new_path=/wp-jquery-lightbox/tags/2.3.5
Sources
- CVE List CVE-2026-4379
- NVD CVE-2026-4379
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.