CVE-2011-4587

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...

6.8 MediumFix available

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.

Exploit likelihood

2.07%Up 0.9 points since Feb 4, 2022

What each source reports

NVD Score used 6.8

Record: CVE-2011-4587
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-255
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-4587
Updated: 2026-11-02

EUVDEUVD-2011-4512 No score

Record: EUVD-2011-4512
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mgqq-8x9v-jp4r No score

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...

Record: GHSA-mgqq-8x9v-jp4r
Updated: 2026-11-02

Affected products

moodle

Affected packages

Affected packages
Package	Affected	Fixed
`moodle` Debian:6.0	before 1.9.9.dfsg2-2.1+squeeze3, plus listed versions 1.9.9.dfsg2-2.11.9.9.dfsg2-2.1+squeeze11.9.9.dfsg2-2.1+squeeze2	1.9.9.dfsg2-2.1+squeeze3

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-4587 is a medium vulnerability (CVSS 6.8) in Moodle, published February 29, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.07%, the 81st percentile. Fixed in moodle 1.9.9.dfsg2-2.1+squeeze3.