Etherpad
CVE-2021-34817
MEDIUM
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
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. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Technical ContextAI
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Etherpad.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
An Argument Injection issue in the plugin management of Etherpad 1.8.13 allows privileged users to execute arbitrary cod
Etherpad 1.6.3 before 1.6.4 allows an attacker to execute arbitrary code. Rated critical severity (CVSS 9.8), this vulne
node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass
Etherpad is a real-time collaborative editor. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable
Directory traversal vulnerability in node/utils/Minify.js in Etherpad 1.1.1 through 1.5.2 allows remote attackers to rea
Etherpad 1.5.x and 1.6.x before 1.6.4 allows an attacker to execute arbitrary code on the server. Rated high severity (C
Directory traversal vulnerability in node/hooks/express/tests.js in Etherpad frontend tests before 1.6.1. Rated high sev
Etherpad 1.5.x and 1.6.x before 1.6.4 allows an attacker to export all the existing pads of an instance without knowledg
templates/pad.html in Etherpad-Lite 1.7.5 has XSS when the browser does not encode the path of the URL, as demonstrated
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today