CVE-2021-25320
CVE-2021-25320 is a critical-severity vulnerability in Rancher with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.
Key facts
- Severity: Critical (CVSS 3.x base score 9.9)
- CVSS v2: 4.0
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-284
- Affected product: Rancher
- Published:
- Last modified:
Description
A Improper Access Control vulnerability in Rancher, allows users in the cluster to make request to cloud providers by creating requests with the cloud-credential ID. Rancher in this case would attach the requested credentials without further checks This issue affects: Rancher versions prior to 2.5.9; Rancher versions prior to 2.4.16.
Frequently asked questions
- What is CVE-2021-25320?
- A Improper Access Control vulnerability in Rancher, allows users in the cluster to make request to cloud providers by creating requests with the cloud-credential ID. Rancher in this case would attach the requested credentials without further checks This issue affects: Rancher versions prior to 2.5.9; Rancher versions prior to 2.4.16.
- How severe is CVE-2021-25320?
- CVE-2021-25320 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-25320 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-25320?
- CVE-2021-25320 affects Rancher. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-25320?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-25320 published?
- CVE-2021-25320 was published on 2021-07-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:rancher:rancher:*:*:*:*:*:*:*:*
More vulnerabilities in Rancher
- CVE-2021-36776 — High (CVSS 8.8): A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users. This issue…
- CVE-2021-36775 — High (CVSS 8.8): a Improper Access Control vulnerability in SUSE Rancher allows users to keep privileges that should have been revoked.…
- CVE-2021-31999 — High (CVSS 8.8): A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster to act as…
- CVE-2021-25318 — High (CVSS 8.8): A Incorrect Permission Assignment for Critical Resource vulnerability in Rancher allows users in the cluster to modify…
Other CWE-284 (Improper Access Control) vulnerabilities
- CVE-2026-76607 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Missing ACL check in download element in Fabrik < 4.7.3 - ???.
- CVE-2026-20315 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Workload engineering…
- CVE-2026-70921 — Critical (CVSS 10.0): Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The…
- CVE-2026-66803 — Critical (CVSS 10.0): Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
- CVE-2026-58630 — Critical (CVSS 10.0): Improper access control in Azure App Service allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-60358 — Critical (CVSS 10.0): Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: Authentication Engine).…
Browse all CWE-284 (Improper Access Control) vulnerabilities →