Is CVE-2018-25334 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2018-25334 being exploited in the wild.

How severe is CVE-2018-25334?

Medium severity, with a CVSS score of 5.4, published 17 May 2026.

Is there a fix for CVE-2018-25334?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2018-25334 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2018-25334?

Check whether you run Bylancer Zechat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2018-25334: Bylancer Zechat CSRF in hashtag parameter

CVE-2018-25334 · Severity: medium · CVSS 5.4 · Published 2026-05-17

Zechat is a PHP-based chat application. A security flaw in version 1.5 allows an attacker to trick a logged-in user into unknowingly performing actions, such as changing their account profile information or email address. This could lead to unauthorized account modifications or potential account takeover if a user visits a malicious website while logged into the chat service.

Technologies: Bylancer Zechat. Vendors: Bylancer.

Quick answers

Is CVE-2018-25334 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2018-25334 being exploited in the wild.
How severe is CVE-2018-25334?: Medium severity, with a CVSS score of 5.4, published 17 May 2026.
Which products and versions are affected?: Bylancer Zechat 1.5.
Is there a fix for CVE-2018-25334?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2018-25334 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2018-25334?: Check whether you run Bylancer Zechat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Cross-Site Request Forgery (CSRF) vulnerability exists in Zechat 1.5 due to insufficient protection on sensitive user-data update endpoints. While the application implements a CSRF token mechanism, it is vulnerable to a bypass. An attacker can leverage a reflected XSS vulnerability in the 'hashtag' parameter or use a script to programmatically fetch the valid CSRF token from the settings page and then submit a forged POST request to /chat/data_settings.php. This allows an unauthenticated remote attacker to modify user profile details, including names and email addresses, provided they can trick an authenticated user into interacting with a malicious link or form. Proof-of-concept exploits also indicate related SQL injection vulnerabilities in the 'hashtag' and 'v' parameters.

Affected products

Bylancer Zechat 1.5

Timeline

2018-05-22: disclosed: Original exploit and vulnerability details published on Exploit-DB
2026-05-17: advisory: CVE-2018-25334 published to NVD via VulnCheck enrichment

References

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