CVE-2015-5267

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-02-22 · updated 2026-06-17
Weakness: CWE-200

Description

lib/moodlelib.php in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 relies on the PHP mt_rand function to implement the random_string and complex_random_string functions, which makes it easier for remote attackers to predict password-recovery tokens via a brute-force approach.

Affected products

Moodle: through 2.6.11; 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5 (+14)

References

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50860
http://www.openwall.com/lists/oss-security/2015/09/21/1
http://www.securitytracker.com/id/1033619
https://moodle.org/mod/forum/discuss.php?d=320291
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50860
http://www.openwall.com/lists/oss-security/2015/09/21/1
http://www.securitytracker.com/id/1033619
https://moodle.org/mod/forum/discuss.php?d=320291

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