Skip to main content

Etherpad CVE-2021-34817

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2021-07-19 cve@mitre.org
6.1
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
6.1 MEDIUM
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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
CVE Published
Jul 19, 2021 - 14:15 nvd
MEDIUM 6.1

DescriptionNVD

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.

CVE-2018-9845 CRITICAL POC
9.8 Apr 29

Etherpad Lite before 1.6.4 is exploitable for admin access. Rated critical severity (CVSS 9.8), this vulnerability is re

CVE-2021-34816 HIGH POC
7.2 Jul 21

An Argument Injection issue in the plugin management of Etherpad 1.8.13 allows privileged users to execute arbitrary cod

CVE-2026-55089 CRITICAL
9.9 Aug 19

Privilege escalation to administrative API access in Etherpad 2.1.0 through 3.0.x lets any authenticated non-admin OAuth

CVE-2018-9326 CRITICAL
9.8 Apr 07

Etherpad 1.6.3 before 1.6.4 allows an attacker to execute arbitrary code. Rated critical severity (CVSS 9.8), this vulne

CVE-2018-6835 CRITICAL
9.8 Feb 08

node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass

CVE-2026-55085 CRITICAL
9.6 Aug 19

Stored cross-site scripting in Etherpad before 3.3.1 lets any user with write access to a pad execute arbitrary JavaScri

CVE-2021-43802 HIGH
8.8 Dec 09

Etherpad is a real-time collaborative editor. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable

CVE-2015-3297 HIGH
7.5 Jul 07

Directory traversal vulnerability in node/utils/Minify.js in Etherpad 1.1.1 through 1.5.2 allows remote attackers to rea

CVE-2018-9327 HIGH
8.1 Apr 07

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

CVE-2015-4085 HIGH
7.5 Sep 07

Directory traversal vulnerability in node/hooks/express/tests.js in Etherpad frontend tests before 1.6.1. Rated high sev

CVE-2018-9325 HIGH
7.5 Apr 07

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

CVE-2019-18209 MEDIUM
6.1 Oct 19

templates/pad.html in Etherpad-Lite 1.7.5 has XSS when the browser does not encode the path of the URL, as demonstrated

Share

CVE-2021-34817 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy