What’s Vulnerable › Vulnerabilities

CVE-2020-27839

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-26 · updated 2026-06-17
• Weakness: CWE-522

Description

A flaw was found in ceph-dashboard. The JSON Web Token (JWT) used for user authentication is stored by the frontend application in the browser’s localStorage which is potentially vulnerable to attackers via XSS attacks. The highest threat from this vulnerability is to data confidentiality and integrity.

Affected products

• ceph: before 14.2.17; from 15.2.0 before 15.2.9 — fixed in 14.2.17, 15.2.9

How to fix

Upgrade to a fixed version: ceph 14.2.17, 15.2.9. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1901330
• https://bugzilla.redhat.com/show_bug.cgi?id=1901330

Get alerted when CVE-2020-27839 or the next vulnerability affects your stack