Medium severity · published May 12, 2021
CVE-2021-23135
Exposure of System Data to an Unauthorized Control Sphere vulnerability in web UI of Argo CD allows attacker to cause leaked secret data into web UI error messages and logs
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Exposure of System Data to an Unauthorized Control Sphere vulnerability in web UI of Argo CD allows attacker to cause leaked secret data into web UI error messages and logs. This issue affects Argo CD 1.8 versions prior to 1.8.7; 1.7 versions prior to 1.7.14.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
Argo CD · Argoproj
1.7.0 before 1.7.14; 1.8.0 before 1.8.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23135
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-23135
Third Party Advisory
https://github.com/argoproj/argo-cd/security/advisories/GHSA-fp89-h8pj-8894
More from Argo CD
10.0
CVE-2022-29165
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes
9.9
CVE-2026-113709
Argo CD: A Kustomize Helm config home can run commands in the repo-server
9.9
CVE-2026-113708
Argo CD: A Kustomize remote ref can run commands in the repo-server
9.9
CVE-2026-113672
Argo CD: A Jsonnet import can read files from the repo-server
9.9
CVE-2026-77459
Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks
