CVE-2026-73377 Overview
CVE-2026-73377 is a broken access control vulnerability affecting the Ultimate Maps by Supsystic WordPress plugin in versions prior to 1.5.0. The flaw allows unauthenticated attackers to invoke restricted plugin functionality over the network without any authentication or user interaction. The issue is classified under CWE-862: Missing Authorization. Successful exploitation impacts data integrity on affected WordPress sites, according to the Patchstack Vulnerability Report.
Critical Impact
Unauthenticated network attackers can invoke privileged plugin actions and modify data managed by Ultimate Maps by Supsystic on unpatched WordPress installations.
Affected Products
- Ultimate Maps by Supsystic WordPress plugin versions prior to 1.5.0
- WordPress sites running the vulnerable plugin with default configuration
- Any environment exposing the plugin endpoints to untrusted networks
Discovery Timeline
- 2026-08-18 - CVE-2026-73377 published to NVD
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-73377
Vulnerability Analysis
The vulnerability stems from missing authorization checks on plugin actions exposed by Ultimate Maps by Supsystic. The plugin fails to validate the capability or authentication state of the caller before executing sensitive operations. An unauthenticated attacker can send crafted requests directly to plugin endpoints and trigger functionality intended for privileged users.
The flaw affects the integrity of data managed through the plugin. Confidentiality and availability are not directly impacted according to the published metrics, but attackers can alter plugin state and stored content. Because the attack is network-based and requires no user interaction, exploitation can be fully automated against exposed WordPress sites.
Root Cause
The root cause is a failure to enforce authorization on plugin request handlers. Handlers exposed via WordPress AJAX or REST endpoints do not verify that the caller holds the required capability or a valid nonce before executing action logic. This pattern maps directly to CWE-862: Missing Authorization.
Attack Vector
An attacker reaches the vulnerable endpoints over the network without credentials. The request targets the plugin's action handler and passes parameters that would normally require administrator-level access. Because no capability check is performed, the handler processes the request and applies changes to plugin-managed data. Refer to the Patchstack Vulnerability Report for further technical context. No verified public proof-of-concept code is available at this time.
Detection Methods for CVE-2026-73377
Indicators of Compromise
- Unexpected modifications to map configurations, markers, or plugin settings stored by Ultimate Maps by Supsystic.
- HTTP POST requests to plugin AJAX or REST endpoints originating from unauthenticated sessions or unfamiliar IP addresses.
- WordPress database rows related to the plugin changing outside of administrator activity windows.
Detection Strategies
- Inspect web server access logs for repeated requests to Ultimate Maps by Supsystic action handlers lacking valid authentication cookies.
- Correlate plugin data changes with administrator login events; unexplained changes indicate probable exploitation.
- Deploy a web application firewall rule to log and alert on plugin endpoint access from sources outside expected administrator ranges.
Monitoring Recommendations
- Enable WordPress audit logging to record plugin option changes and API calls.
- Forward WordPress and web server logs to a centralized analytics platform to baseline normal plugin usage.
- Alert on the presence of the vulnerable plugin version < 1.5.0 in software inventory scans.
How to Mitigate CVE-2026-73377
Immediate Actions Required
- Upgrade Ultimate Maps by Supsystic to version 1.5.0 or later on every WordPress instance.
- Audit the WordPress site for unauthorized changes to plugin data, settings, and stored content.
- Restrict administrative endpoints behind a web application firewall or IP allow list where feasible.
Patch Information
The vendor addresses this issue in Ultimate Maps by Supsystic 1.5.0. Site administrators should update through the WordPress plugin manager or by deploying the updated package directly. See the Patchstack Vulnerability Report for advisory details.
Workarounds
- If immediate patching is not possible, deactivate the Ultimate Maps by Supsystic plugin until the update can be applied.
- Block unauthenticated requests to plugin AJAX and REST routes at the web application firewall layer.
- Limit access to /wp-admin/admin-ajax.php and plugin-specific REST endpoints using authenticated reverse proxy rules where operationally acceptable.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
