CSRF in Bylancer Zechat
CVE-2018-25334
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (3.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Bylancer Zechat — versions 1.5
Weakness classification (CWE)
References
- bylancer.com (product)
- www.exploit-db.com/exploits/44685 (exploit)
- www.vulncheck.com/advisories/zechat-cross-site-request-forgery-csrf-via-hashtag… (third-party-advisory)
Frequently asked questions
- What is CVE-2018-25334?
- CVE-2018-25334 is a medium-severity vulnerability in Bylancer Zechat, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-05-17.
- How severe is CVE-2018-25334?
- Medium severity. CVSS v3 base score is 5.4 out of 10.