CVE-2022-0437Public exploitNetwork attack vector

Browser script execution via unvalidated return URL

Published Feb 5, 2022 · Updated Aug 2, 2024

DOM-based XSS in Karma before 6.3.14 allows remote attackers to execute script in a user's browser through a crafted return URL. Code in client/karma.js and static/karma.js assigns the return_url query value directly to location.href without restricting it to HTTP or HTTPS, so a JavaScript URI executes. Exploitation requires a user to open the crafted URL; the resulting script can read or alter data available to the Karma origin, with no reported availability impact.

CVSS severity6.1
Medium
EPSS probability15.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Karma before 6.3.14 allows remote attackers to execute script in a user's browser through a crafted return URL. Code in client/karma.js and static/karma.js assigns the return_url query value directly to location.href without restricting it to HTTP or HTTPS, so a JavaScript URI executes. Exploitation requires a user to open the crafted URL; the resulting script can read or alter data available to the Karma origin, with no reported availability impact.

The record

CVE
CVE-2022-0437
Published
Feb 5, 2022
Updated
Aug 2, 2024
Vendor
Karma Runner
Product
Karma
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <6.3.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Karma Runner · Karmaversion=unspecified <6.3.14

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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 exploitPublished

Weakness, pattern, technique

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

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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