CVE-2021-34817

PoC —

CVSS 3.1

6.1 medium

EPSS

1%p70

Published

Jul 19, 2021 (Jul 19, 2021)

Modified

Jun 17, 2026

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.

Vendors: etherpad
Products: etherpad
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (1.3%)

In the news1 stories

Critical Flaws Reported in Etherpad — a Popular Google Docs Alternative

The Hacker NewsJul 15, 00:00 UTC · Jul 15, 2021Vulnerability CVE-2021-34816 CVE-2021-34817