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CVE-2011-4593

16
FAUCET Score

CVE-2011-4593 describes an information disclosure vulnerability in Moodle versions 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1.x before 2.1.3. This flaw allows remote authenticated users to discover email addresses by accessing the messaging interface due to improper handling of user/action_redir group messages. The vulnerability has a CVSS score of 4.0, indicating a medium severity. It can be exploited over the network with low attack complexity by an authenticated user, leading to a partial disclosure of information (email addresses) without impacting integrity or availability. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public attention.

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

4.0MEDIUM

AV:N/AC:L/Au:S/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.67%
Probability of exploitation in next 30 days
EPSS Percentile
74.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0167 is in the 88th percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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
PatchVendor Advisory
bugzilla.redhat.com / show_bug.cgi