CVE-2022-30935

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-09-28 · updated 2026-06-17
Weakness: CWE-330

Description

An authorization bypass in b2evolution allows remote, unauthenticated attackers to predict password reset tokens for any user through the use of a bad randomness function. This allows the attacker to get valid sessions for arbitrary users, and optionally reset their password. Tested and confirmed in a default installation of version 7.2.3. Earlier versions are affected, possibly earlier major versions as well.

Affected products

b2evolution: before 7.2.5 — fixed in 7.2.5

How to fix

Upgrade to a fixed version: b2evolution 7.2.5. Check the vendor advisory for mitigations.

References

https://b2evolution.net/downloads/7-2-5-stable
https://github.com/b2evolution/b2evolution/blob/master/inc/_core/_misc.funcs.php#L5955
https://github.com/b2evolution/b2evolution/issues/114
https://b2evolution.net/downloads/7-2-5-stable
https://github.com/b2evolution/b2evolution/blob/master/inc/_core/_misc.funcs.php#L5955
https://github.com/b2evolution/b2evolution/issues/114

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