XSS in Rubyonrails Rails
CVE-2020-8264
In actionpack gem >= 6.0.0, a possible XSS vulnerability exists when an application is running in development mode allowing an attacker to send or embed (in another page) a specially crafted URL which can allow the attacker to execute JavaScript in the context of the local application. This vulnerability is in the Actionable Exceptions middleware.
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: 0.670 (99.3th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.670 · newest: 0.670 · change: 0.000
Affected products
- Rubyonrails Rails
- Https://github.com/rails/rails — versions 6.0.3.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/904059 (Exploit, Patch, Third Party Advisory)
- groups.google.com/g/rubyonrails-security/c/yQzUVfv42jk/m/oJWw-xhNAQAJ (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8264?
- CVE-2020-8264 is a medium-severity vulnerability in Rubyonrails Rails, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-01-06.
- How severe is CVE-2020-8264?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2020-8264 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.