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TI-2026-83229 Aliases CVE-2026-76012GHSA-5hr5-5vc8-hvg6

Unrestricted file upload in NextGEN Gallery enables code execution

Priority LOW 36CWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

The Photo Gallery, Sliders, Proofing and Themes (NextGEN Gallery) plugin for WordPress by smub is affected in all versions up to and including 4.4.1. The Lightroom gallery_edit endpoint lacks proper authorization, and its upload check matches file extensions by substring, so files named like .php_ are accepted as templates (CWE-434). An authenticated attacker with custom-level access or above, who is the stored author of at least one gallery, can execute code on the server.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.4.1 via the legacy_render function. This is due to broken authorization on the Lightroom gallery_edit endpoint combined with mass assignment of gallery path and unrestricted file upload into a registered template directory, whose extension check uses a substring match that accepts sanitized .php_ filenames as valid templates. This makes it possible for authenticated attackers, with custom-level access and above, to execute code on the server. Exploitation requires the authenticated attacker to be the stored author of at least one existing NextGEN gallery, as ownership of that gallery is the sole authorization check gating the mass-assignment and upload steps.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00829 57th 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
Total

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 4.4.1—No fix listedCNA
  • Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery Vendorsmub Affected up to 4.4.1 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 · 2026-10-31

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-76012
  2. 2026-10-30 CISA SSVC decision points changed
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-10-30 Alias added: GHSA-5hr5-5vc8-hvg6

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