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CVE-2011-4302

21
FAUCET Score

CVE-2011-4302 describes a vulnerability in Moodle versions 1.9.x, 2.0.x, and 2.1.x, specifically within the mnet/xmlrpc/client.php component. This flaw stems from improper processing of the openssl_verify function's return value, enabling remote attackers to bypass certificate validation using a specially crafted certificate. With a CVSS score of 6.8, this vulnerability is of medium severity, allowing for potential partial compromise of confidentiality, integrity, and availability with medium attack complexity and no authentication required. 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
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

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
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 36th percentile among its peer group of 19,958 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

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

References

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