CVE-2011-4587

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-07-20 · updated 2026-06-16
Weakness: CWE-255

Description

lib/moodlelib.php in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1.x before 2.1.3 does not properly handle certain zero values in the password policy, which makes it easier for remote attackers to obtain access by leveraging the possible existence of user accounts that have unchangeable blank passwords.

Affected products

Moodle: 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6 (+17)

References

http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=e079e82c087becf06d902089d14f3f76686bde19
http://moodle.org/mod/forum/discuss.php?d=191755
http://www.debian.org/security/2012/dsa-2421
https://bugzilla.redhat.com/show_bug.cgi?id=761248
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=e079e82c087becf06d902089d14f3f76686bde19
http://moodle.org/mod/forum/discuss.php?d=191755
http://www.debian.org/security/2012/dsa-2421
https://bugzilla.redhat.com/show_bug.cgi?id=761248

Get alerted when CVE-2011-4587 or the next vulnerability affects your stack