CVE-2026-49063 Overview
CVE-2026-49063 is an unauthenticated privilege escalation vulnerability affecting the Listdom WordPress plugin in versions up to and including 5.5.0. The flaw is categorized under [CWE-266] Incorrect Privilege Assignment, allowing attackers without valid credentials to gain elevated permissions on affected WordPress sites. The vulnerability is exploitable over the network with low attack complexity and requires no user interaction. Successful exploitation grants attackers unauthorized access to functionality that should be restricted to privileged accounts.
Critical Impact
Unauthenticated attackers can escalate privileges on WordPress sites running Listdom <= 5.5.0, potentially leading to site compromise, content manipulation, and persistent access.
Affected Products
- Listdom WordPress plugin versions <= 5.5.0
- WordPress installations using the Listdom directory and business listings plugin
- Sites with the vulnerable plugin active and accessible to unauthenticated visitors
Discovery Timeline
- 2026-06-15 - CVE-2026-49063 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-49063
Vulnerability Analysis
The Listdom plugin contains an incorrect privilege assignment flaw that permits unauthenticated users to perform actions reserved for higher-privileged roles. The vulnerability is classified as [CWE-266] Incorrect Privilege Assignment, indicating that the plugin grants permissions beyond what the requesting principal should receive. Network-based exploitation does not require authentication or user interaction, lowering the barrier for attackers to weaponize the issue.
The EPSS probability is 0.219% with a percentile of 12.245, indicating limited current exploitation forecasting. However, WordPress plugins with unauthenticated privilege escalation flaws historically attract opportunistic exploitation once details and proof-of-concept code become public.
Root Cause
The root cause is improper enforcement of role and capability checks within plugin endpoints or actions. The plugin assigns or honors privileges based on attacker-controlled input rather than validated server-side authorization context. This pattern allows unauthenticated requests to invoke functionality that should require authenticated, capability-bearing users.
Attack Vector
Attackers send crafted HTTP requests to vulnerable endpoints exposed by the Listdom plugin. Because authentication is not required, any internet-reachable WordPress site running the affected versions is exposed. Refer to the Patchstack Vulnerability Report for additional technical context on the exploitation path.
No verified public proof-of-concept code is available at this time. The vulnerability is described in prose without synthetic exploitation examples to avoid misleading defenders.
Detection Methods for CVE-2026-49063
Indicators of Compromise
- Unexpected creation of WordPress user accounts, especially with administrator or editor roles, without corresponding admin activity logs
- Modifications to plugin or theme files, options tables, or wp_usermeta entries originating from unauthenticated HTTP sessions
- HTTP POST requests targeting Listdom plugin endpoints (paths under /wp-admin/admin-ajax.php or /wp-json/) from unauthenticated sources followed by privileged actions
Detection Strategies
- Monitor web server access logs for repeated requests to Listdom plugin endpoints from a single source IP that lacks authentication cookies
- Compare current WordPress user, role, and capability state against a known-good baseline to detect unauthorized role assignments
- Inspect WordPress audit logs for capability changes or option updates that occurred without an authenticated admin session
Monitoring Recommendations
- Enable a WordPress activity logging plugin to capture role and privilege changes with timestamps and source IPs
- Forward web server, WordPress, and database logs to a centralized SIEM for correlation across the request, authentication, and privilege layers
- Alert on any new user with administrative capabilities created outside of approved provisioning workflows
How to Mitigate CVE-2026-49063
Immediate Actions Required
- Update the Listdom plugin to a version newer than 5.5.0 that addresses CVE-2026-49063 once released by the vendor
- Audit existing WordPress user accounts and remove any unrecognized or recently created privileged users
- Rotate credentials and session tokens for all administrator accounts after confirming the plugin is patched
Patch Information
Consult the Patchstack Vulnerability Report for the current fixed-version guidance from the plugin maintainer. Apply the vendor-supplied update through the WordPress plugin manager or via WP-CLI as soon as it is published.
Workarounds
- Deactivate and remove the Listdom plugin until a fixed version is installed if the functionality is not business-critical
- Place the WordPress site behind a web application firewall configured to block requests to known vulnerable Listdom endpoints
- Restrict access to /wp-admin/admin-ajax.php and Listdom REST routes by IP allowlist where feasible to reduce exposure
# Configuration example: disable the Listdom plugin via WP-CLI until a patch is applied
wp plugin deactivate listdom
wp plugin status listdom
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
