Peertube
CVE-2021-3780
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
peertube is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
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.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
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. peertube is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affected products include: Framasoft Peertube.
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- Exploit and PoC references, threat intelligence from 22 sources
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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
DescriptionNVD
peertube is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)NVD
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This vulnerability allows any attacker to cause the PeerTube server to stop responding to requests due to an infinite lo
This vulnerability allows any authenticated user to cause the server to consume very large amounts of disk space when ex
The vulnerability allows any authenticated user to cause the PeerTube server to stop functioning in a persistent manner.
Insecure Storage of Sensitive Information in GitHub repository chocobozzz/peertube prior to 4.1.1. Rated medium severity
Improper Access Control in GitHub repository chocobozzz/peertube prior to 4.1.0. Rated medium severity (CVSS 5.4), this
Missing Authorization in GitHub repository chocobozzz/peertube prior to 4.1.0. Rated medium severity (CVSS 5.4), this vu
This vulnerability allows any attacker to add playlists to a different user’s channel using the ActivityPub protocol. Ra
The vulnerability allows an existing user to add playlists to a different user’s channel using the PeerTube REST API. Ra
The vulnerability allows any authenticated user to leak the contents of arbitrary “.m3u8” files from the PeerTube server
Stored XSS in PeerTube before version 8.2.2 allows any authenticated uploader to inject arbitrary HTML and JavaScript in
Exploit-DB