XSS in Etherpad
CVE-2021-34817
A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.
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: 0.013 (71.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Etherpad — versions 1.8.13
Weakness classification (CWE)
References
- etherpad.org/ (Patch, Vendor Advisory)
- github.com/ether/etherpad-lite/releases/tag/1.8.14 (Patch, Third Party Advisory, Release Notes)
- blog.sonarsource.com/etherpad-code-execution-vulnerabilities (Third Party Advisory)
- github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa (Exploit, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34817?
- CVE-2021-34817 is a medium-severity vulnerability in Etherpad, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-19.
- How severe is CVE-2021-34817?
- Medium severity. CVSS v3 base score is 6.1 out of 10.