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CVE-2021-25318

26
FAUCET Score

CVE-2021-25318 is an Incorrect Permission Assignment vulnerability in Rancher versions prior to 2.5.9 and 2.4.16, allowing authenticated users to modify resources they should not have access to within the cluster. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.4.16CPE matchmatch criteria
cpe:2.3:a:rancher:rancher:*:*:*:*:*:*:*:*
>= 2.5.0, < 2.5.9CPE matchmatch criteria
cpe:2.3:a:rancher:rancher:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 57th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

gopatch availablevia ghsa
Product: github.com/rancher/rancherFixed in: 2.4.16
gopatch availablevia ghsa
Product: github.com/rancher/rancherFixed in: 2.5.9

Vendor Advisories (1)

goGHSA-f9xf-jq4j-vqw4high

Rancher does not properly specify ApiGroup when creating Kubernetes RBAC resources

Apr 24, 2024

References

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