CVE-2026-14482 in MultiSocialReviewPlugin
Summary
by MITRE • 07/08/2026
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.
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Analysis
by VulDB Data Team • 07/08/2026
The vulnerability in the 多说社会化评论框 plugin for WordPress represents a critical privilege escalation flaw affecting all versions up to and including 120. This security weakness stems from inadequate access controls within a web-accessible API endpoint that lacks proper capability verification and nonce validation mechanisms. The flaw operates through a combination of missing authentication checks and a trivially forgeable HMAC-SHA1 signature system that relies on an always-empty WordPress option as its key. This design creates a dangerous attack vector where unauthenticated adversaries can manipulate the system's core configuration parameters.
The technical implementation of this vulnerability allows attackers to directly pass malicious `option` and `value` parameters to WordPress's native `update_option` function without any input sanitization or parameter validation. The HMAC-SHA1 signature verification process becomes ineffective due to the predictable empty key, making it trivial for attackers to forge valid requests. This weakness maps directly to CWE-284 which addresses improper access control and CWE-352 which covers cross-site request forgery vulnerabilities. The attack pattern aligns with ATT&CK technique T1078.004 which involves valid accounts and T1548.003 which focuses on abuse of sudoers.
The operational impact of this vulnerability is severe as it grants unauthenticated attackers complete administrative control over affected WordPress installations. Attackers can modify critical system options such as setting `default_role` to `administrator`, enabling open registration, and potentially manipulating other sensitive configuration parameters. This privilege escalation enables adversaries to create administrator accounts, modify content, install malicious plugins, and compromise the entire website infrastructure. The vulnerability creates a persistent backdoor that can be exploited repeatedly until the plugin is updated or removed.
Mitigation strategies should focus on immediate plugin updates to versions that address the authentication and validation issues. Administrators must ensure all WordPress installations maintain current security patches and regularly audit their plugin ecosystem for similar vulnerabilities. Network-based protections such as web application firewalls can help detect and block malicious API requests, while monitoring systems should track unauthorized option modifications. The vulnerability highlights the importance of implementing proper input validation, capability checks, and nonce verification in all web-accessible endpoints, particularly those handling administrative functions. Regular security audits of third-party plugins and adherence to security best practices including principle of least privilege are essential for preventing similar vulnerabilities in the future.