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TI-2026-83465 Aliases CVE-2026-116563GHSA-mmc9-9v24-7pg8

DOM-based cross-site scripting in NextGEN Gallery WordPress plugin

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Photo Gallery, Sliders, Proofing and Themes (NextGEN Gallery) plugin for WordPress from smub is affected in all versions up to and including 4.5.4. Insufficient input sanitization and output escaping of the comment parameter allows stored DOM-based cross-site scripting (CWE-79). An unauthenticated attacker can inject scripts that run for visitors of an injected page when the site uses Shutter or Shutter Reloaded as its lightbox and the comment is approved.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00352 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
smubPhoto Gallery, Sliders, Proofing and Themes – NextGEN Galleryup to 4.5.4—No fix listedCNA
  • Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery Vendorsmub Affected up to 4.5.4 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Photo Gallery, Sliders, Proofing and Themes (NextGEN Gallery).

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-10-31 Threatist record created from CVE-2026-116563
  2. 2026-10-31 Alias added: GHSA-mmc9-9v24-7pg8
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-01 CISA SSVC decision points changed

References

Other 8

  • TI-2026-07755 WPCode <= 2.3.5 - Authenticated (Author+) Remote Code Execution via CPT Capability Bypass via XML-RPC wp.newPost CVSS 3.1HIGH 8.8
  • TI-2026-83530 Remote code execution in NextGEN Gallery plugin for WordPress CVSS 3.1HIGH 8.8
  • TI-2026-78567 PHP object injection in Duplicator and Duplicator Pro plugins CVSS 3.1HIGH 8.8
  • TI-2026-01649 ExactMetrics 8.6.0 - 9.0.2 - Authenticated (Custom) Insecure Direct Object Reference to Arbitrary Plugin Installation CVSS 3.1HIGH 8.8
  • TI-2026-01160 Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery <= 4.0.4 - Authenticated (Author+) Local File Inclusion CVSS 3.1HIGH 8.8
  • TI-2025-12465 Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery <= 3.59.12 - Authenticated… CVSS 3.1HIGH 8.8
See all 67 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences