CVE-2025-3177: FastCMS JWT hard-coded key

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-04-03 · updated 2026-06-17
Weakness: CWE-320

Description

A vulnerability was found in FastCMS 0.1.5. It has been declared as critical. This vulnerability affects unknown code of the component JWT Handler. The manipulation leads to use of hard-coded cryptographic key . The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Affected products

Fastcms Project Fastcms: 0.1.5

References

https://github.com/chujianxin0101/vuln/issues/2
https://vuldb.com/?ctiid.303136
https://vuldb.com/?id.303136
https://vuldb.com/?submit.543673
https://github.com/chujianxin0101/vuln/issues/2

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