XSS in Apache Knox
CVE-2021-42357
When using Apache Knox SSO prior to 1.6.1, a request could be crafted to redirect a user to a malicious page due to improper URL parsing. A request that included a specially crafted request parameter could be used to redirect the user to a page controlled by an attacker. This URL would need to be presented to the user outside the normal request flow through a XSS or phishing campaign.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.026 (84.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Apache Knox
- Apache Software Foundation Knox — versions Apache Knox 1.x, 0.12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread/b7v5dkpyqb51nw0lvz4cybhgrfhk1g7j (Mailing List, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/01/17/2 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42357?
- CVE-2021-42357 is a medium-severity vulnerability in Apache Knox, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-17.
- How severe is CVE-2021-42357?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-42357 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.