Hedgedoc
CVE-2021-39175
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Input neutralization, injection prevention
|
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
HedgeDoc is a platform to write and share markdown. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-74. HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading. Affected products include: Hedgedoc. Version information: prior to 1.9.0.
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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
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
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
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)NVD
HedgeDoc is a collaborative platform for writing and sharing markdown. Rated high severity (CVSS 8.7), this vulnerabilit
HedgeDoc is software for creating real-time collaborative markdown notes. Rated high severity (CVSS 8.2), this vulnerabi
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Rated medium severity (CVSS 6.5), this
HedgeDoc is open source software which lets you create real-time collaborative markdown notes. Rated medium severity (CV
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. Rated critical severity (CVSS 10.0)
HedgeDoc (formerly known as CodiMD) is an open-source collaborative markdown editor. Rated medium severity (CVSS 5.8), t
Denial of service in HedgeDoc before 1.11.0 lets a user who can store a note crash the instance by embedding a YAML "ali
HedgeDoc is a collaborative platform for writing and sharing markdown. Rated high severity (CVSS 7.5), this vulnerabilit
Rate-limiting bypass in HedgeDoc prior to 1.11.0 permits unauthenticated remote attackers to circumvent brute-force prot
HedgeDoc's GitHub Gist export feature exposes private and protected note content to attacker-controlled GitHub accounts
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Rated medium severity (CVSS 6.4), this
HedgeDoc is a platform to write and share markdown. Rated medium severity (CVSS 6.1), this vulnerability is remotely exp
Exploit-DB