CVE-2011-4584

The MNET authentication functionality in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1...

4.0 Medium

The MNET authentication functionality in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1.x before 2.1.3 allows remote authenticated users to impersonate other user accounts by using the Login As feature in conjunction with a remote MNET single sign-on capability, as demonstrated by a Mahara site.

Exploit likelihood

1.73%Up 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 4.0

Record: CVE-2011-4584
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:N/I:P/A:N
Weakness: CWE-264
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-4584
Updated: 2026-11-02

EUVDEUVD-2011-4509 No score

Record: EUVD-2011-4509
Updated: 2026-11-03

GitHub AdvisoriesGHSA-x8rw-c396-qjg7 No score

The MNET authentication functionality in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1...

Record: GHSA-x8rw-c396-qjg7
Updated: 2026-11-02

Affected products

moodle

Affected packages

Affected packages
Package	Affected	Fixed
`moodle` Debian:6.0 From an advisory covering 11 CVEs	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 6, 2026	affected, facts
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-2011-4584 is a medium vulnerability (CVSS 4.0) in Moodle, published February 29, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.73%, the 77th percentile. No source names a fixed version.