CVE-2010-4626

Severity: medium (CVSS 5.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-12-30 · updated 2026-06-16
Weakness: CWE-310

Description

The my_rand function in functions.php in MyBB (aka MyBulletinBoard) before 1.4.12 does not properly use the PHP mt_rand function, which makes it easier for remote attackers to obtain access to an arbitrary account by requesting a reset of the account's password, and then conducting a brute-force attack.

Affected products

mybb: through 1.4.11; 1.00, 1.01, 1.1.0, 1.1.1, 1.1.2, 1.1.3 (+30)

References

http://blog.mybb.com/2010/04/13/mybb-1-4-12-released-security-maintenance-update/
http://dev.mybboard.net/issues/843
http://dev.mybboard.net/projects/mybb/repository/revisions/4872
http://openwall.com/lists/oss-security/2010/10/08/7
http://openwall.com/lists/oss-security/2010/10/11/8
http://openwall.com/lists/oss-security/2010/12/06/2
https://exchange.xforce.ibmcloud.com/vulnerabilities/64516
http://blog.mybb.com/2010/04/13/mybb-1-4-12-released-security-maintenance-update/
http://dev.mybboard.net/issues/843
http://dev.mybboard.net/projects/mybb/repository/revisions/4872
http://openwall.com/lists/oss-security/2010/10/08/7
http://openwall.com/lists/oss-security/2010/10/11/8

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