Unautorized access to the calendar appointments

published 2021-07-26 5y ago modified 2026-06-17 4mo ago also EUVD-2021-22723

cvss: 3.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

Agents are able to list appointments in the calendars without required permissions. This issue affects: OTRS AG ((OTRS)) Community Edition: 6.0.x version 6.0.1 and later versions. OTRS AG OTRS: 7.0.x versions prior to 7.0.27.

Patch / fix

fixed in 1 distros 1

OTRS AG OTRS 7.0.27

otrs2 Debian 11 6.0.32-6

debian advisories DEBIAN-CVE-2021-36091

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Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N

Affected products

OTRS AG ((OTRS)) Community Edition
OTRS AG OTRS

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-863 Incorrect Authorization

References

otrs.com /release-notes/otrs-security-advisory-2021-14/
vendor-advisory
lists.debian.org /debian-lts-announce/2023/08/msg00040.html
mailing-list

Sources

CVE List CVE-2021-36091
NVD CVE-2021-36091

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