CVE-2021-23347: Cross-site Scripting (XSS)

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-03 · updated 2026-06-17
Weakness: CWE-79

Description

The package github.com/argoproj/argo-cd/cmd before 1.7.13, from 1.8.0 and before 1.8.6 are vulnerable to Cross-site Scripting (XSS) the SSO provider connected to Argo CD would have to send back a malicious error message containing JavaScript to the user.

Affected products

argoproj argo-cd: before 1.7.13; from 1.8.0 before 1.8.6 — fixed in 1.7.13, 1.8.6

How to fix

Upgrade to a fixed version: argoproj argo-cd 1.7.13, 1.8.6. Check the vendor advisory for mitigations.

References

https://github.com/argoproj/argo-cd/pull/5563
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMARGOPROJARGOCDCMD-1078291
https://github.com/argoproj/argo-cd/pull/5563
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMARGOPROJARGOCDCMD-1078291

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