EUVD-2026-42162
GHSA-mc85-hq4f-frgp
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description states unauthenticated web-accessible endpoint with forgeable signature, so PR:N (not the input's PR:L) and AC:L; option overwrite yields full admin takeover, so C:H/I:H/A:H.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
The 多说社会化评论框 plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.2. The vulnerability exists due to a missing capability and nonce check on a directly web-accessible API endpoint, combined with a trivially forgeable HMAC-SHA1 signature keyed on an always-empty WordPress option, which allows the endpoint's update_option handler to pass attacker-controlled option and value parameters directly to WordPress's update_option function without any allowlist or sanitization. This makes it possible for unauthenticated attackers to update arbitrary WordPress options - such as setting default_role to administrator and enabling open registration - and subsequently register an account with full administrator privileges.
AnalysisAI
Privilege escalation in the Duoshuo (多说社会化评论框) social commenting plugin for WordPress (all versions through 1.2) lets remote attackers seize full administrator control. An unauthenticated, web-accessible API endpoint (api.php/LocalServer.php) exposes an update_option handler that lacks capability and nonce checks and relies on a trivially forgeable HMAC-SHA1 signature keyed on an always-empty option, allowing attackers to overwrite any WordPress option - for example flipping default_role to administrator and enabling open registration, then self-registering an admin account. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target WordPress site has the Duoshuo (多说社会化评论框) plugin version ≤1.2 installed and active, exposing its web-accessible api.php/LocalServer.php `update_option` endpoint to the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are strong but partially conflicting. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker scanning for WordPress sites running Duoshuo sends a crafted HTTP request to the plugin's public API endpoint with a forged HMAC-SHA1 signature (computable because the signing key is an always-empty option), setting `option=default_role`/`value=administrator` and enabling `users_can_register`. They then submit the standard wp-login.php?action=register form to create an account that is automatically granted administrator rights, giving full site takeover. … |
| Remediation | No vendor-released patch version is identified in the available data, and the Duoshuo plugin appears unmaintained, so the primary recommendation is to deactivate and fully remove (uninstall) the plugin rather than wait for a fix - its backing Duoshuo service is defunct, so removal has minimal functional cost. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all WordPress installations running Duoshuo versions ≤1.2 and immediately deactivate and delete the plugin; audit all administrator accounts for unauthorized additions or suspicious access patterns. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today