CVE-2011-4586

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-07-20 · updated 2026-06-16

Description

CRLF injection vulnerability in calendar/set.php in the Calendar subsystem in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, and 2.1.x before 2.1.3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

Affected products

Moodle: 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6 (+17)

References

http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=581e8dba387f090d89382115fd850d8b44351526
http://moodle.org/mod/forum/discuss.php?d=191754
http://www.debian.org/security/2012/dsa-2421
https://bugzilla.redhat.com/show_bug.cgi?id=761248
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=581e8dba387f090d89382115fd850d8b44351526
http://moodle.org/mod/forum/discuss.php?d=191754
http://www.debian.org/security/2012/dsa-2421
https://bugzilla.redhat.com/show_bug.cgi?id=761248

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