CVE-2025-22657: Atarim Authorization Bypass Vulnerability

CVE-2025-22657 Overview

CVE-2025-22657 is a missing authorization vulnerability [CWE-862] in the Vito Peleg Atarim Visual Collaboration plugin for WordPress. The flaw affects all versions up to and including 4.0.9. Attackers can exploit incorrectly configured access control security levels to trigger arbitrary content deletion on affected sites. The vulnerability requires no authentication and is exploitable over the network with low attack complexity. The CVSS 3.1 score of 7.5 reflects high availability impact without confidentiality or integrity compromise. According to the Patchstack advisory, the issue enables unauthenticated arbitrary content deletion on vulnerable WordPress installations running the plugin.

Critical Impact

Unauthenticated remote attackers can delete arbitrary content on WordPress sites running Atarim Visual Collaboration plugin versions through 4.0.9, causing denial of service.

Affected Products

• Vito Peleg Atarim Visual Collaboration plugin for WordPress
• All versions from initial release through 4.0.9
• WordPress sites with the atarim-visual-collaboration plugin installed and active

Discovery Timeline

• 2025-02-18 - CVE-2025-22657 published to the National Vulnerability Database
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-22657

Vulnerability Analysis

The vulnerability stems from a missing authorization check classified under CWE-862. The Atarim Visual Collaboration plugin exposes functionality that performs sensitive content operations without verifying that the requesting user has the necessary capabilities. Because the access control logic is incorrectly configured, the affected endpoints accept requests from unauthenticated sources. According to the Patchstack database entry, this results in arbitrary content deletion across the affected WordPress site.

The attack vector is network-based and requires no user interaction or prior authentication. The impact is limited to availability, meaning attackers cannot read confidential data or modify arbitrary records through this flaw, but they can destroy content. EPSS data places the exploitation probability at 0.173% with a percentile of 38.26 as of May 2026.

Root Cause

The root cause is the absence of proper capability or nonce verification on plugin actions that perform destructive operations. WordPress plugins must use current_user_can() checks and validate nonces via check_ajax_referer() or wp_verify_nonce() before executing privileged operations. In Atarim versions through 4.0.9, these checks are either missing or incorrectly scoped, allowing any visitor to invoke delete operations.

Attack Vector

An unauthenticated attacker sends a crafted HTTP request to the vulnerable plugin endpoint exposed by the WordPress site. Because authorization is not enforced, the plugin processes the request and removes targeted content. No code execution code example is published for this issue; refer to the Patchstack Vulnerability Database Entry for additional technical context.

Detection Methods for CVE-2025-22657

Indicators of Compromise

• Unexpected deletion of posts, pages, comments, or plugin-managed collaboration items in WordPress
• HTTP POST or GET requests to atarim-visual-collaboration plugin endpoints from unauthenticated sessions
• Spikes in admin-ajax.php traffic referencing Atarim plugin actions with no associated logged-in user
• WordPress audit log entries showing destructive operations attributed to anonymous or guest users

Detection Strategies

• Inventory WordPress installations and identify any running the atarim-visual-collaboration plugin at version 4.0.9 or earlier
• Review web server access logs for requests targeting plugin endpoints without valid authentication cookies
• Deploy a WordPress activity monitoring plugin that logs content deletion events with source IP attribution
• Correlate content deletion events against authentication logs to surface anonymous deletion activity

Monitoring Recommendations

• Forward WordPress and web server logs to a centralized SIEM for correlation and retention
• Alert on any anonymous HTTP request that triggers a wp_delete_post or equivalent database write
• Monitor outbound rate of 4xx and 5xx responses on plugin endpoints, which may indicate scanning activity
• Track plugin version drift across WordPress fleets to detect unpatched installations

How to Mitigate CVE-2025-22657

Immediate Actions Required

• Update the Atarim Visual Collaboration plugin to a version newer than 4.0.9 once the vendor publishes a fix
• If no patched version is available, deactivate and remove the plugin from all WordPress installations
• Take a full backup of WordPress content and the database before remediation
• Audit content tables for unauthorized deletions and restore from backup if necessary

Patch Information

The vulnerability affects Atarim Visual Collaboration through version 4.0.9. Administrators should monitor the Patchstack Vulnerability Database Entry and the official WordPress plugin repository for an updated release that introduces proper capability and nonce validation on the affected endpoints.

Workarounds

• Restrict access to wp-admin/admin-ajax.php Atarim actions using a web application firewall rule
• Block unauthenticated POST requests to URLs containing atarim or the plugin's action parameters at the WAF or reverse proxy layer
• Limit plugin functionality to specific IP ranges using server-level access controls until a patch is applied
• Disable the plugin on production sites where collaboration features are not actively required

# Example WAF rule (ModSecurity) to block unauthenticated Atarim actions
SecRule REQUEST_URI "@contains admin-ajax.php" \
    "chain,deny,status:403,id:1022657,msg:'Block unauthenticated Atarim plugin actions'"
  SecRule ARGS:action "@rx ^atarim" \
    "chain"
    SecRule &REQUEST_COOKIES:wordpress_logged_in_ "@eq 0"