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% (53rd 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.

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% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Rancher
Published: 2021-07-15
Last modified: 2026-06-17

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% (53rd 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

https://bugzilla.suse.com/show_bug.cgi?id=1185514

Affected products (1)

cpe:2.3:a:rancher:rancher:*:*:*:*:*:*:*:*

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