In Red Hat Advanced Cluster Security (RHACS), it was found that some security related HTTP headers were missing, allowing an attacker to exploit this with a clickjacking attack. An attacker could exploit this by convincing a valid RHACS user to visit an attacker-controlled web page, that deceptively points to valid RHACS endpoints, hijacking the user's account permissions to perform other actions.
Conclusion & alert: CVE-2023-4958 is rated Low Risk (27.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-21 | 0.15% | 0.03% | -0.12% |
| 2 | 2025-11-18 | 0.03% | 0.15% | +0.12% |
| 3 | 2025-04-15 | — | 0.03% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-4958 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| redhat | advanced_cluster_security | 3.0 | cpe:2.3:a:redhat:advanced_cluster_security:3.0:*:*:*:*:*:*:* |
| redhat | advanced_cluster_security | 4.0 | cpe:2.3:a:redhat:advanced_cluster_security:4.0:*:*:*:*:kubernates:*:* |
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2023:5206 | Vendor Advisory |
| https://access.redhat.com/security/cve/CVE-2023-4958 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1990363 | Issue Tracking Patch |