CVE-2018-25334: Zechat 1.5 Cross-Site Request Forgery (CSRF) via hashtag parameter

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-17 · updated 2026-06-17
Weakness: CWE-352

Description

Zechat 1.5 contains a Cross-Site Request Forgery (CSRF) vulnerability that allows an attacker to change a user's information by bypassing anti-CSRF protections. The application uses a CSRF token, but an attacker can use the hashtag parameter to inject an encoded payload and bypass the CSRF protection, allowing for unauthorized changes to user data. This can be exploited by tricking a user into submitting a crafted form or by using a script to obtain and set the CSRF token.

Affected products

Bylancer Zechat: 1.5

References

https://bylancer.com
https://www.exploit-db.com/exploits/44685
https://www.vulncheck.com/advisories/zechat-cross-site-request-forgery-csrf-via-hashtag-parameter

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