CVE-2021-36094Network attack vector

Authenticated XSS via appointment edit request

Published Sep 6, 2021 · Updated Sep 16, 2024

Cross-site scripting in OTRS AG OTRS 7.0.x through 7.0.28 allows remote authenticated users to execute script via a crafted appointment edit request. The appointment edit popup request is the named input path, but the advisory does not disclose the specific parameter or sanitization operation that fails to neutralize script. Exploitation requires an authenticated account and user interaction with the affected popup; the same issue is reported for ((OTRS)) Community Edition 6.0.1 and later 6.0.x releases, with integrity impact and no stated availability impact.

CVSS severity5.7
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in OTRS AG OTRS 7.0.x through 7.0.28 allows remote authenticated users to execute script via a crafted appointment edit request. The appointment edit popup request is the named input path, but the advisory does not disclose the specific parameter or sanitization operation that fails to neutralize script. Exploitation requires an authenticated account and user interaction with the affected popup; the same issue is reported for ((OTRS)) Community Edition 6.0.1 and later 6.0.x releases, with integrity impact and no stated availability impact.

The record

CVE
CVE-2021-36094
Published
Sep 6, 2021
Updated
Sep 16, 2024
Vendor
OTRS AG
Product
OTRS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.x <=7.0.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OTRS AG · OTRSversion=7.0.x <=7.0.28
OTRS AG · ((OTRS)) Community Editionversion=6.0.1 <6.0.x*

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.7OTRS AGCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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