What’s Vulnerable › Vulnerabilities

CVE-2020-1776: Invalidating or changing user does not invalidate session

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-20 · updated 2026-06-17
• Weakness: CWE-613

Description

When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.

Affected products

• OTRS AG OTRS: before 6.0.29; from 7.0.0 before 7.0.19; from 8.0.1 before 8.0.5 — fixed in 6.0.29, 7.0.19, 8.0.5

How to fix

Upgrade to a fixed version: OTRS AG OTRS 6.0.29, 7.0.19, 8.0.5. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://otrs.com/release-notes/otrs-security-advisory-2020-13/
• https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
• https://otrs.com/release-notes/otrs-security-advisory-2020-13/

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