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CVE-2021-3557

23
FAUCET Score

CVE-2021-3557 is a medium-severity flaw in Argo CD and OpenShift GitOps that allows unprivileged users to deploy Argo CD in their namespace. This enables them to read all cluster resources, including secrets, potentially leading to privilege escalation and compromising data confidentiality. The vulnerability has a CVSS score of 6.5, indicating a network-based attack with low complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.1CPE matchmatch criteria
cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_gitops:1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 63rd percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/applicationset-rhel8:v1.1.1-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/argocd-rhel8:v1.1.1-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/gitops-operator-bundle:v1.1.1-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/gitops-rhel8:v1.1.1-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/gitops-rhel8-operator:v1.1.1-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift GitOps 1.1Fixed in: openshift-gitops-1/kam-delivery-rhel8:v1.1.1-1
View patch

Vendor Advisories (1)

redhatCVE-2021-3557Important

argocd: ServiceAccount argocd-argocd-server is able to read all resources of the whole cluster

May 19, 2021

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory