CVE-2021-4108Public exploitNetwork attack vector

Stored XSS via unescaped assignee display name

Published Dec 14, 2021 · Updated Aug 3, 2024

Stored XSS in Snipe-IT before 5.3.5 allows remote authenticated users to execute script in other users' browsers via an assignee name. AssetsTransformer::transformAssignedTo returns the assigned user's display_name in asset API data without HTML escaping, and the web interface consumes that data. Exploitation requires control of a displayed assignee name and another user to view the affected asset data, causing script execution in that viewer's session.

CVSS severity6.1
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Snipe-IT before 5.3.5 allows remote authenticated users to execute script in other users' browsers via an assignee name. AssetsTransformer::transformAssignedTo returns the assigned user's display_name in asset API data without HTML escaping, and the web interface consumes that data. Exploitation requires control of a displayed assignee name and another user to view the affected asset data, causing script execution in that viewer's session.

The record

CVE
CVE-2021-4108
Published
Dec 14, 2021
Updated
Aug 3, 2024
Vendor
Grokability, Inc.
Product
Snipe-IT
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=unspecified <5.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grokability, Inc. · Snipe-ITversion=unspecified <5.3.5

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.4huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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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