CVE-2016-2156

Severity: medium (CVSS 4.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-05-22 · updated 2026-06-17
Weakness: CWE-200

Description

calendar/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 provides calendar-event data without considering whether an activity is hidden, which allows remote authenticated users to obtain sensitive information via a web-service request.

Affected products

Moodle: through 2.6.11; 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5 (+26)

References

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52808
http://www.openwall.com/lists/oss-security/2016/03/21/1
http://www.securitytracker.com/id/1035333
https://moodle.org/mod/forum/discuss.php?d=330178
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-52808
http://www.openwall.com/lists/oss-security/2016/03/21/1
http://www.securitytracker.com/id/1035333
https://moodle.org/mod/forum/discuss.php?d=330178

Get alerted when CVE-2016-2156 or the next vulnerability affects your stack