CVE-2010-4626

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.

Published: 2010-12-30 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-4626 is rated Moderate Risk (49.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.15%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2010-4626

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.33% 2.15% +0.82%
2 2025-03-30 1.84% 1.33% -0.50%
3 2025-03-29 — 1.84% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-4626

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.1 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 6.4 [email protected]

Weakness enumeration for CVE-2010-4626

Affected software / configurations for CVE-2010-4626

Vendor Product Version Raw CPE
mybb mybb <= 1.4.11 cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
mybb mybb 1.00 cpe:2.3:a:mybb:mybb:1.00:*:*:*:*:*:*:*
mybb mybb 1.01 cpe:2.3:a:mybb:mybb:1.01:*:*:*:*:*:*:*
mybb mybb 1.1.0 cpe:2.3:a:mybb:mybb:1.1.0:*:*:*:*:*:*:*
mybb mybb 1.1.1 cpe:2.3:a:mybb:mybb:1.1.1:*:*:*:*:*:*:*
mybb mybb 1.1.2 cpe:2.3:a:mybb:mybb:1.1.2:*:*:*:*:*:*:*
mybb mybb 1.1.3 cpe:2.3:a:mybb:mybb:1.1.3:*:*:*:*:*:*:*
mybb mybb 1.1.4 cpe:2.3:a:mybb:mybb:1.1.4:*:*:*:*:*:*:*
mybb mybb 1.1.5 cpe:2.3:a:mybb:mybb:1.1.5:*:*:*:*:*:*:*
mybb mybb 1.1.6 cpe:2.3:a:mybb:mybb:1.1.6:*:*:*:*:*:*:*
mybb mybb 1.1.7 cpe:2.3:a:mybb:mybb:1.1.7:*:*:*:*:*:*:*
mybb mybb 1.1.8 cpe:2.3:a:mybb:mybb:1.1.8:*:*:*:*:*:*:*
mybb mybb 1.02 cpe:2.3:a:mybb:mybb:1.02:*:*:*:*:*:*:*
mybb mybb 1.2 cpe:2.3:a:mybb:mybb:1.2:*:*:*:*:*:*:*
mybb mybb 1.2.0 cpe:2.3:a:mybb:mybb:1.2.0:*:*:*:*:*:*:*
mybb mybb 1.2.1 cpe:2.3:a:mybb:mybb:1.2.1:*:*:*:*:*:*:*
mybb mybb 1.2.2 cpe:2.3:a:mybb:mybb:1.2.2:*:*:*:*:*:*:*
mybb mybb 1.2.3 cpe:2.3:a:mybb:mybb:1.2.3:*:*:*:*:*:*:*
mybb mybb 1.2.4 cpe:2.3:a:mybb:mybb:1.2.4:*:*:*:*:*:*:*
mybb mybb 1.2.5 cpe:2.3:a:mybb:mybb:1.2.5:*:*:*:*:*:*:*
mybb mybb 1.2.6 cpe:2.3:a:mybb:mybb:1.2.6:*:*:*:*:*:*:*
mybb mybb 1.2.7 cpe:2.3:a:mybb:mybb:1.2.7:*:*:*:*:*:*:*
mybb mybb 1.2.8 cpe:2.3:a:mybb:mybb:1.2.8:*:*:*:*:*:*:*
mybb mybb 1.2.9 cpe:2.3:a:mybb:mybb:1.2.9:*:*:*:*:*:*:*
mybb mybb 1.2.10 cpe:2.3:a:mybb:mybb:1.2.10:*:*:*:*:*:*:*
mybb mybb 1.2.11 cpe:2.3:a:mybb:mybb:1.2.11:*:*:*:*:*:*:*
mybb mybb 1.2.12 cpe:2.3:a:mybb:mybb:1.2.12:*:*:*:*:*:*:*
mybb mybb 1.2.13 cpe:2.3:a:mybb:mybb:1.2.13:*:*:*:*:*:*:*
mybb mybb 1.03 cpe:2.3:a:mybb:mybb:1.03:*:*:*:*:*:*:*
mybb mybb 1.04 cpe:2.3:a:mybb:mybb:1.04:*:*:*:*:*:*:*
mybb mybb 1.4.0 cpe:2.3:a:mybb:mybb:1.4.0:*:*:*:*:*:*:*
mybb mybb 1.4.2 cpe:2.3:a:mybb:mybb:1.4.2:*:*:*:*:*:*:*
mybb mybb 1.4.3 cpe:2.3:a:mybb:mybb:1.4.3:*:*:*:*:*:*:*
mybb mybb 1.4.6 cpe:2.3:a:mybb:mybb:1.4.6:*:*:*:*:*:*:*
mybb mybb 1.4.8 cpe:2.3:a:mybb:mybb:1.4.8:*:*:*:*:*:*:*
mybb mybb 1.4.9 cpe:2.3:a:mybb:mybb:1.4.9:*:*:*:*:*:*:*
mybb mybb 1.4.10 cpe:2.3:a:mybb:mybb:1.4.10:*:*:*:*:*:*:*

References for CVE-2010-4626

cvelogic Threat Intelligence