CVE-2026-24638: RepairBuddy Auth Bypass Vulnerability

CVE-2026-24638 Overview

CVE-2026-24638 is a missing authorization vulnerability in the Webful Creations RepairBuddy plugin for WordPress. The flaw stems from incorrectly configured access control security levels [CWE-862]. Authenticated users with low privileges can invoke functionality intended for higher-privileged roles. The issue affects RepairBuddy versions up to and including 4.1121.

The vulnerability is network-exploitable with low attack complexity and requires low-privileged authentication. Successful exploitation impacts integrity but does not affect confidentiality or availability.

Critical Impact
Authenticated attackers can bypass authorization checks in RepairBuddy and modify data restricted to higher-privileged users on affected WordPress sites.

Affected Products

Webful Creations RepairBuddy WordPress plugin (Computer Repair Shop)
All versions from n/a through 4.1121
WordPress installations with the vulnerable plugin enabled

Discovery Timeline

2026-05-26 - CVE-2026-24638 published to NVD
2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-24638

Vulnerability Analysis

The RepairBuddy plugin exposes one or more action handlers without verifying that the requesting user holds the required capability or role. WordPress plugins must enforce authorization using current_user_can() or equivalent capability checks before performing privileged operations. RepairBuddy fails to apply these checks consistently across its endpoints.

An authenticated user, including low-privileged accounts such as subscribers or customers, can send crafted requests to restricted handlers. The plugin processes these requests and executes the underlying action without rejecting the caller. This produces an integrity impact because attackers can alter records or trigger workflows reserved for shop managers or administrators.

The issue is categorized under Broken Access Control and tracked by Patchstack in their public vulnerability database. EPSS data places the likelihood of observed exploitation low at the time of publication.

Root Cause

The root cause is a missing authorization check on plugin action handlers. The code path validates that a request is authenticated but does not validate the role or capability of the calling user. This design omission allows horizontal and limited vertical privilege escalation within the plugin scope.

Attack Vector

An attacker first obtains any authenticated session on the target WordPress site. They then issue HTTP requests to the vulnerable RepairBuddy endpoints with parameters targeting records or actions outside their authorization scope. The server accepts the requests and modifies plugin data. No user interaction beyond the attacker's own session is required.

No verified public proof-of-concept code is available. See the Patchstack Vulnerability Analysis for technical details.

Detection Methods for CVE-2026-24638

Indicators of Compromise

Unexpected modifications to RepairBuddy records such as repair tickets, customer entries, or invoices made by low-privileged accounts.
HTTP POST or GET requests to RepairBuddy admin-ajax actions originating from non-administrative user sessions.
WordPress audit log entries showing capability-restricted actions performed by subscriber or customer roles.

Detection Strategies

Review web server access logs for requests to admin-ajax.php or RepairBuddy REST routes paired with low-privileged session cookies.
Correlate WordPress user role data with plugin action logs to identify role and action mismatches.
Monitor database changes against RepairBuddy tables for writes that do not match the originating user's authorization scope.

Monitoring Recommendations

Enable a WordPress activity logging plugin and forward events to a centralized SIEM for correlation.
Alert on bulk modifications to RepairBuddy records within short time windows from a single user.
Track newly registered accounts that immediately interact with plugin admin endpoints.

How to Mitigate CVE-2026-24638

Immediate Actions Required

Update the RepairBuddy plugin to a release later than 4.1121 once the vendor publishes a fixed version.
Audit user accounts and remove unused or untrusted low-privileged accounts on the affected WordPress site.
Restrict new user registration if the site does not require open self-service signup.

Patch Information

At the time of publication, the advisory tracks the vulnerability as affecting RepairBuddy up to version 4.1121. Administrators should consult the Patchstack Vulnerability Analysis and the WordPress plugin repository for the latest patched release.

Workarounds

Disable the RepairBuddy plugin until a patched version is available if the business workflow allows.
Place the WordPress admin and AJAX endpoints behind a web application firewall rule that blocks RepairBuddy action parameters from non-administrative users.
Apply a custom must-use plugin that adds capability checks to RepairBuddy AJAX hooks as a temporary control.

bash

# Configuration example: WAF rule concept to block RepairBuddy actions from low-privileged sessions
# Block admin-ajax requests for RepairBuddy actions when the session role is not in the allowlist
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1026024638,msg:'Block RepairBuddy unauthorized action'"
SecRule ARGS:action "@rx ^(repairbuddy_|rb_)" \
  "chain"
SecRule REQUEST_COOKIES:wordpress_logged_in_* "@rx .*" \
  "t:none"