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CVE-2011-4587

21
FAUCET Score

CVE-2011-4587 describes a vulnerability in Moodle versions 1.9.x, 2.0.x, and 2.1.x, where improper handling of zero values in the password policy could lead to user accounts with unchangeable blank passwords. This vulnerability has a CVSS score of 6.8, indicating a medium severity risk with a network attack vector, medium attack complexity, and potential for partial confidentiality, integrity, and availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.9.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.1:*:*:*:*:*:*:*
1.9.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.2:*:*:*:*:*:*:*
1.9.3CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.3:*:*:*:*:*:*:*
1.9.4CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.4:*:*:*:*:*:*:*
1.9.5CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.07%
Probability of exploitation in next 30 days
EPSS Percentile
79.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0207 is in the 65th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

git.moodle.org / gw
moodle.org / mod/forum/discuss.php
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
debian.org / security/2012/dsa-2421