Is CVE-2026-4979 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-4979, but active exploitation has not been confirmed.

Can CVE-2026-4979 be exploited remotely?

Yes. CVE-2026-4979 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4979?

CVE-2026-4979 has a CVSS score of 5.0 (MEDIUM).

HOME VULNERABILITIESCVE-2026-4979

MEDIUMPOC

CVE-2026-4979

CWE-918Published: April 11, 2026· Updated: Apr 13, 2026

5.0

CVSS v3.1

Official Description

The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP plugin for WordPress is vulnerable to blind Server-Side Request Forgery in all versions up to, and including, 1.2.58. This is due to insufficient URL origin validation in the process_image_crop() method when processing avatar/banner image crop operations. The function accepts a user-controlled URL via the uwp_crop POST parameter and only validates it using esc_url() for sanitization and wp_check_filetype() for extension verification, without enforcing that the URL references a local uploads file. The URL is then passed to uwp_resizeThumbnailImage() which uses it in PHP image processing functions (getimagesize(), imagecreatefrom*()) that support URL wrappers and perform outbound HTTP requests. This makes it possible for authenticated attackers with subscriber-level access and above to coerce the WordPress server into making arbitrary HTTP requests to attacker-controlled or internal network destinations, enabling internal network scanning and potential access to sensitive services.

NVD Source

Technical Analysis

CVE-2026-4979 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2026-4979. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.