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Argo CD allows cross-site scripting on repositories page

Critical severity GitHub Reviewed Published May 28, 2025 in argoproj/argo-cd • Updated May 29, 2025

Package

gomodgithub.com/argoproj/argo-cd (Go)

Affected versions

>= 1.2.0-rc1, <= 1.8.7

Patched versions

None
gomodgithub.com/argoproj/argo-cd/v2 (Go)
>= 2.0.0-rc3, < 2.13.8
>= 2.14.0-rc1, < 2.14.13
2.13.8
2.14.13
gomodgithub.com/argoproj/argo-cd/v3 (Go)
< 3.0.4
3.0.4

Description

Impact

This vulnerability allows an attacker to perform arbitrary actions on behalf of the victim via the API, such as creating, modifying, and deleting Kubernetes resources. Due to the improper filtering of URL protocols in the repository page, an attacker can achieve cross-site scripting with permission to edit the repository.

In ui/src/app/shared/components/urls.ts, the following code exists to parse the repository URL.

https://github.com/argoproj/argo-cd/blob/0ae5882d5ae9fe88efc51f65ca8543fb8c3a0aa1/ui/src/app/shared/components/urls.ts#L14-L26

Since this code doesn't validate the protocol of repository URLs, it's possible to inject javascript: URLs here.

https://github.com/argoproj/argo-cd/blob/0ae5882d5ae9fe88efc51f65ca8543fb8c3a0aa1/ui/src/app/shared/components/repo.tsx#L5-L7

As the return value of this function is used in the href attribute of the a tag, it's possible to achieve cross-site scripting by using javascript: URLs.

Browsers may return the proper hostname for javascript: URLs, allowing exploitation of this vulnerability.

Patches

A patch for this vulnerability has been released in the following Argo CD versions:

  • v3.0.4
  • v2.14.13
  • v2.13.8

The patch incorporates a way to validate the URL being passed in. Returning null if the validation fails.

Workarounds

There are no workarounds other than depending on the browser to filter the URL.

Credits

Disclosed by @Ry0taKRyotaK.

For more information

Open an issue in the Argo CD issue tracker or discussions
Join us on Slack in channel #argo-cd

References

@crenshaw-devcrenshaw-dev published to argoproj/argo-cd May 28, 2025
Published to the GitHub Advisory Database May 28, 2025
Reviewed May 28, 2025
Published by the National Vulnerability DatabaseMay 29, 2025
Last updated May 29, 2025

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector:More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity:More severe for the least complex attacks.
Privileges required:More severe if no privileges are required.
User interaction:More severe when no user interaction is required.
Scope:More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality:More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity:More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability:More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(1st percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2025-47933

GHSA ID

GHSA-2hj5-g64g-fp6p

Source code

Credits

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