CVE-2018-25334 Unknown Vendor CVE debrief

Who should care

Administrators, application owners, and security teams responsible for Zechat 1.5 deployments should care, especially if the application is used to manage user profiles or other state-changing actions.

Technical summary

The supplied record classifies CVE-2018-25334 as CWE-352 (Cross-Site Request Forgery) with a Medium severity score of 5.3. The issue is described as a bypass of anti-CSRF protections in Zechat 1.5, where the hashtag parameter can be used to inject an encoded payload and allow unauthorized changes to user information; the recorded impact is primarily integrity-related and requires user interaction.

Defensive priority

Medium: prioritize validation and mitigation if Zechat is in active use, since the flaw can change user data and depends on user interaction rather than direct server-side access.

Recommended defensive actions

• Inventory any Zechat 1.5 deployments and confirm whether the affected functionality is exposed to users.
• Review the application's CSRF implementation around state-changing requests, especially any logic influenced by the hashtag parameter.
• Ensure CSRF validation is enforced server-side and is not dependent on client-controlled input.
• Restrict sensitive account changes to authenticated POST/PUT-style workflows with strict origin and token checks.
• Monitor for unexpected profile or account-detail changes and review logs for suspicious request patterns.
• If abuse is suspected, reassess active sessions and rotate credentials or session material as appropriate for your environment.

Evidence notes

The supplied NVD record identifies CVE-2018-25334 as a CSRF issue (CWE-352) with a Medium 5.3 score and references Zechat/Bylancer-related material, Exploit-DB, and a VulnCheck advisory. The vendor attribution in the supplied data is low-confidence and should be treated as tentative rather than confirmed.

Official resources