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CVE-2011-4582

17
FAUCET Score

CVE-2011-4582 describes an open redirect vulnerability in Moodle 2.1.x before version 2.1.3, specifically within the Calendar set page, allowing authenticated users to redirect others to arbitrary external websites for phishing. The vulnerability has a CVSS score of 4.9, indicating a medium severity with network access, medium attack complexity, and requiring authentication, potentially leading to partial confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.1.0:*:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.1.1:*:*:*:*:*:*:*
2.1.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 62nd percentile among its peer group of 1,424 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.1.3

Vendor Advisories (1)

composerGHSA-jcrj-x36p-h9f6medium

Moodle Open Redirect in Calendar Set Page

May 13, 2022

References

git.moodle.org / gw
Patch
moodle.org / mod/forum/discuss.php
PatchVendor Advisory
bugzilla.redhat.com / show_bug.cgi