No exploitation reportedFix available

CVE-2021-25313

Q: Is CVE-2021-25313 actively exploited?

Active exploitation of CVE-2021-25313 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-25313?

CVE-2021-25313 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

No exploitation reported by the sources we read.

Published2021-03-05
Fixed in2.5.6 · 2.4.14 · 2.3.11
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rancher allows remote attackers to execute JavaScript via malicious links. This issue affects: SUSE Rancher Rancher versions prior to 2.5.6.

Timeline

dates in UTC

2021-03-0509:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-25313?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-25313?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Suse rancher

Branch	Affected	Fixed in	Source
2.5	< 2.5.6	2.5.6	NVD
2.5	≥ 2.5.0, < 2.5.6	2.5.6	OSV
2.4	≥ 2.4.0, < 2.4.14	2.4.14	OSV
2.3	< 2.3.11	2.3.11	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Suse rancher to 2.5.6 · 2.4.14 · 2.3.11

Advisories and patches

bugzilla.suse.comVendor Advisory
github.comRelease Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.1read 2026-10-23
NVDCVSS 3.16.1read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
CNAweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2021-03-05
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-25313?

Is CVE-2021-25313 actively exploited?

Active exploitation of CVE-2021-25313 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-25313?

CVE-2021-25313 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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