CVE-2025-9891
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The User Sync – Remote User Sync plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.2. This is due to missing or incorrect nonce validation on the mo_user_sync_form_handler() function. This makes it possible for unauthenticated attackers to deactivate the plugin via a forged request, granted they can trick a site administrator into performing an action such as clicking on a link.
Risk Assessment
An attacker can remotely deactivate the plugin without the administrator's knowledge, potentially disrupting user synchronization and causing security consequences. This only requires tricking an administrator into clicking a crafted link.
Recommendation
Update the User Sync – Remote User Sync plugin to a version later than 1.0.2 that includes the nonce validation fix. Until patched, consider deactivating the plugin or limiting administrator privileges.
Related vulnerabilities
- CVE-2026-17609Critical
The Super Forms plugin for WordPress up to version 6.3.316 contains an arbitrary directory deletion vulnerability. This is due to insufficient validation of attacker-controlled JSON fields and an ineffective ABSPATH guard that can be easily bypassed. An unauthenticated attacker can recursively delete arbitrary directories on the server, including the WordPress root directory, provided the administrator has enabled the 'Delete files from server after form submissions' setting.
- CVE-2026-107282Critical
Vulnerability in AsyncHttpClient (AHC) library before versions 3.0.13 and 2.16.1 allows cross-host request replay that updates the current request but leaves the target request and proxy context pointing to the original origin. This can send the original host's path, Host header, Authorization credentials, or plaintext request to the replay destination.
- CVE-2026-76268Critical
Vulnerability in Splunk Enterprise before versions 10.4.3 and 10.2.7 allows an unauthenticated user with network access to the Patroni REST API on a search head cluster member to execute attacker-controlled OS commands. The interface does not require authentication for critical configuration operations.
- CVE-2026-95606Critical
Deserialization of untrusted data vulnerability in The Events Calendar plugin allows object injection. Affects versions up to 6.17.4.
- CVE-2026-95605Critical
SQL injection vulnerability in WP Data Access allows blind SQL injection. Affects versions up to 5.5.82.
- CVE-2026-76501Critical
Vulnerability in SRv6 OAM (NGOAM) feature of Cisco NX-OS allows unauthenticated remote attacker to execute arbitrary code with root privileges or cause DoS. Due to improper input validation when NGOAM and SRv6 features are enabled.
- CVE-2026-76500Critical
A security review in Cisco APIC revealed multiple vulnerabilities related to improper control of a resource through its lifetime (CWE-664). These have been addressed in hardening releases.
- CVE-2026-76499Critical
A security review in Cisco APIC revealed multiple vulnerabilities related to improper neutralization issues (CWE-707). These have been addressed in hardening releases.
- CVE-2026-76498Critical
A security review in Cisco APIC revealed multiple vulnerabilities related to improper access control (CWE-284). These have been addressed in hardening releases.
- CVE-2026-76486Critical
Vulnerability in VXLAN OAM (NGOAM) feature of Cisco NX-OS allows unauthenticated remote attacker to execute arbitrary code with root privileges or cause DoS. Due to improper input validation when NGOAM is enabled.
Original NVD description (English source)
The User Sync – Remote User Sync plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.2. This is due to missing or incorrect nonce validation on the mo_user_sync_form_handler() function. This makes it possible for unauthenticated attackers to deactivate the plugin via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS