CVE-2021-36092Network attack vector

Cross-site scripting via crafted email link

Published Jul 26, 2021 · Updated Sep 17, 2024

Cross-site scripting in OTRS AG OTRS 7.0.x through 7.0.27 and 8.0.x through 8.0.14 allows remote attackers to execute script via crafted email links. The vendor record identifies specially crafted links embedded in email as the trigger but does not disclose the exact rendering component or sanitization operation. Exploitation requires a recipient to interact with the malicious link, with script execution affecting the recipient's web session and no reported service interruption.

CVSS severity6.1
Medium
EPSS probability0.72%
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 7.0.27 and 8.0.x through 8.0.14 allows remote attackers to execute script via crafted email links. The vendor record identifies specially crafted links embedded in email as the trigger but does not disclose the exact rendering component or sanitization operation. Exploitation requires a recipient to interact with the malicious link, with script execution affecting the recipient's web session and no reported service interruption.

The record

CVE
CVE-2021-36092
Published
Jul 26, 2021
Updated
Sep 17, 2024
Vendor
OTRS AG
Product
OTRS
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.0.x <=7.0.27
  2. Affected versionversion=8.0.x <=8.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OTRS AG · OTRSversion=7.0.x <=7.0.27; version=8.0.x <=8.0.14
OTRS AG · ((OTRS)) Community Editionversion=6.0.1 <6.0.x*

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.5OTRS AGCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3NVDAV:N/AC:M/Au:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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