CVE-2021-4241

phpservermon User.php setUserLoggedIn predictable algorithm in random number generator

MEDIUM
5.3
CVSS Score
Published: November 15, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:19 AM UTC
1 product affected across 1 vendorPHP Server Monitor

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.9%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-331CWE-330

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