CVE-2021-4241: phpservermon User.php setUserLoggedIn predictable algorithm in random number generator

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-11-15 · updated 2026-06-17
Weakness: CWE-331

Description

A vulnerability, which was classified as problematic, was found in phpservermon. Affected is the function setUserLoggedIn of the file src/psm/Service/User.php. The manipulation leads to use of predictable algorithm in random number generator. The exploit has been disclosed to the public and may be used. The name of the patch is bb10a5f3c68527c58073258cb12446782d223bc3. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-213744.

Affected products

phpservermon: all versions

References

https://github.com/phpservermon/phpservermon/commit/bb10a5f3c68527c58073258cb12446782d223bc3
https://huntr.dev/bounties/1-phpservermon/phpservermon/
https://vuldb.com/?id.213744
https://github.com/phpservermon/phpservermon/commit/bb10a5f3c68527c58073258cb12446782d223bc3
https://huntr.dev/bounties/1-phpservermon/phpservermon/
https://vuldb.com/?id.213744

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