{"cve":"CVE-2021-34817","nvd":{"published":"2021-07-19T14:15:08.150","modified":"2026-06-17T03:56:37.430","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities","https://etherpad.org/#download","https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa","https://github.com/ether/etherpad-lite/releases/tag/1.8.14","https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"],"products":["etherpad:etherpad"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-34817","score":0.01343,"percentile":0.71373,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}