What’s Vulnerable › Vulnerabilities

CVE-2021-36095: User enumeration issue using "lost password" feature

• Severity: medium (CVSS 5.3 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: 2021-09-06 · updated 2026-06-17
• Weakness: CWE-200

Description

Malicious attacker is able to find out valid user logins by using the "lost password" feature. This issue affects: OTRS AG ((OTRS)) Community Edition version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.28 and prior versions.

Affected products

• OTRS AG OTRS: from 6.0.1; from 7.0.0 before 7.0.29 — fixed in 7.0.29

How to fix

Upgrade to a fixed version: OTRS AG OTRS 7.0.29. Check the vendor advisory for mitigations.

References

• https://otrs.com/release-notes/otrs-security-advisory-2021-18/
• https://otrs.com/release-notes/otrs-security-advisory-2021-18/

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