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TI-2026-01342 Aliases CVE-2026-1657GHSA-4x73-7vhc-g4xh

EventPrime <= 4.2.8.4 - Missing Authorization to Unauthenticated Image Upload via 'ep_upload_file_media' AJAX Endpoint

Priority LOW 30CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

The EventPrime plugin for WordPress is vulnerable to unauthorized image file upload in all versions up to, and including, 4.2.8.4. This is due to the plugin registering the upload_file_media AJAX action as publicly accessible (nopriv-enabled) without implementing any authentication, authorization, or nonce verification despite a nonce being created. This makes it possible for unauthenticated attackers to upload image files to the WordPress uploads directory and create Media Library attachments via the ep_upload_file_media endpoint.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00427 37th 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
Yes
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
MetagaussEventPrime – Events Calendar, Bookings and Ticketsup to 4.2.8.4—No fix listedCNA
  • EventPrime – Events Calendar, Bookings and Tickets VendorMetagauss Affected up to 4.2.8.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:metagauss:eventprime:*:*:*:*:*:*:*:*——Metagauss
  • cpe:2.3:a:metagauss:eventprime:*:*:*:*:*:*:*:* Versions — — ·Metagauss

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-1657
  2. 2026-10-03 Alias added: GHSA-4x73-7vhc-g4xh

References

Other 6

  • TI-2023-00891 ProfileGrid < 5.3.1 - Subscriber+ Arbitrary Password Reset CVSS 3.1HIGH 8.8
  • TI-2021-07144 RegistrationMagic < 5.0.1.6 - Admin+ SQL Injection CVSS 3.1HIGH 7.2
  • TI-2025-05982 Download Plugin <= 2.2.8 - Authenticated (Administrator+) Arbitrary File Upload CVSS 3.1HIGH 7.2
  • TI-2023-03938 EventPrime <= 3.2.9 - Booking Pricing Bypass CVSS 3.1MEDIUM 5.3
  • TI-2024-20215 WordPress ProfileGrid – User Profiles, Memberships, Groups and Communities plugin <= 5.7.8 - SQL Injection vulnerability CVSS 3.1HIGH 8.8
  • TI-2024-04340 EventPrime – Events Calendar, Bookings and Tickets < 3.5.0 - Subscriber+ Arbitrary booking settings update CVSS 3.1MEDIUM 6.4
See all 163 →

Sources

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