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CVE-2011-4301

18
FAUCET Score

CVE-2011-4301 describes a vulnerability in the MoodleQuickForm class within Moodle's Forms Library (lib/formslib.php). This flaw affects Moodle versions 1.9.x before 1.9.14, 2.0.x before 2.0.5, and 2.1.x before 2.1.2, allowing remote attackers to submit unexpected form content by manipulating constant field values due to the class not recognizing Forms API setConstant operations. The vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity, requiring no authentication, and potentially leading to partial integrity impact (I:P). There is no confidentiality or availability impact. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting low public attention.

Impacted Technologies

VendorProductVersion(s)CPE
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:*:*:*:*:*:*:*
1.9.6CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.9.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.10%
Probability of exploitation in next 30 days
EPSS Percentile
79.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0210 is in the 69th percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 1.9.14
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.0.5
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.1.2

Vendor Advisories (1)

composerGHSA-jcrj-gmr6-p5j8medium

Moodle Allows Modification of Constants

May 13, 2022

References

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