Security readout for executives and security teams
Plain-English summary
Argo CD could display a deployment external URL that is actually a JavaScript link. If a victim clicks it, attacker-controlled script runs with that victim's Argo CD permissions, potentially including admin-level Kubernetes changes. Because Argo CD often controls production delivery, affected deployments need prompt upgrade.
Executive priority
Handle as urgent for environments where Argo CD manages important clusters. The bug requires a click, but a successful attack can inherit admin permissions and modify or delete Kubernetes resources. Upgrade is the only completely safe remediation named in the sources.
Technical view
CVE-2022-31035 is a CWE-79 XSS in Argo CD external URL handling. A malicious authenticated user can inject a javascript: URL into the UI. Exploitation requires user interaction, but the script executes in the victim session and may perform UI or API actions with victim privileges. Fixed versions are 2.4.1, 2.3.5, 2.2.10, and 2.1.16.
Likely exposure
Exposure is likely where Argo CD versions from 1.0.0 up to the fixed release lines are deployed and untrusted or lower-privileged users can influence deployment external URLs. Internet exposure increases phishing and click risk, but the core issue is authenticated UI trust boundary failure.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The advisory describes a low-complexity attack requiring a victim click. Impact is high because successful execution uses the victim's permissions, up to admin, and may affect Kubernetes resources managed by Argo CD.
Researcher notes
The advisory scope is Argo CD external URL rendering, not a general unauthenticated takeover. PR:L and UI:R matter for likelihood, while scope changed and high CIA impact drive severity. Evidence in the bundle supports patch versions and lack of completely safe workarounds, but not active exploitation.
Mitigation direction
- Upgrade Argo CD to 2.4.1, 2.3.5, 2.2.10, 2.1.16, or later.
- Prioritize upgrades for Argo CD instances managing production or shared Kubernetes clusters.
- Treat access restriction and monitoring as temporary controls, not complete workarounds.
- Review and remove suspicious external URLs from Argo CD deployment metadata.
- Follow the Argo CD security advisory for any version-specific guidance.
Validation and detection
- Inventory all Argo CD instances and record exact server versions.
- Compare versions against the affected ranges listed in the advisory.
- Review applications or deployment metadata using external URLs for unsafe schemes.
- Check Argo CD audit logs for unexpected external URL changes.
- Confirm upgraded instances are running a fixed or later release.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-31035 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H2.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-h4w9-6x78-8vrjCVE reference · x_refsource_CONFIRM
- https://github.com/argoproj/argo-cd/commit/8bc3ef690de29c68a36f473908774346a44d4038CVE reference · x_refsource_MISC
- https://argo-cd.readthedocs.io/en/stable/user-guide/external-url/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.