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Vulnerabilities

Vulnerability · CVE-2026-1657

The EventPrime plugin for WordPress is vulnerable to unauthorized image file upload in all versions up to, and including, 4.2.8.4.

Published Feb 17, 2026 · catalog updated Apr 8, 2026 · Metagauss EventPrime – Events Calendar, Bookings and Tickets

Last checked Nov 13, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-1657. EPSS is 0.42%. Act only if a listed version of Metagauss EventPrime – Events Calendar, Bookings and Tickets is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Vendor / distro source
Affected products
vendor Metagauss EventPrime – Events Calendar, Bookings and Tickets 0 ≤4.2.8.4

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Metagauss EventPrime – Events Calendar, Bookings and Tickets 0 ≤4.2.8.40 ≤4.2.8.4

How to fix CVE-2026-1657

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-1657. EPSS is 0.42%. Act only if a listed version of Metagauss EventPrime – Events Calendar, Bookings and Tickets is installed.

Which versions are affected?

Compare what you have installed with Metagauss EventPrime – Events Calendar, Bookings and Tickets 0 ≤4.2.8.4 0 ≤4.2.8.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 17, 2026 · EUVD

    Detected

    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 attac

  2. Apr 8, 2026 · EUVD

    Updated

    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 attac

Sources

  • CVE.orgVulnerability recordCVE-2026-1657

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-1657

    30-day exploitation probability 0.42%

    first.org
  • EUVDVulnerability recordEUVD-2026-7818

    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 authenticati

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 13, 2026
  • CVE.orgNov 7, 2026
  • EUVDNov 7, 2026