CVE-2021-39175

XSS vector in slide mode speaker-view

MEDIUM
6.1
CVSS Score
Published: August 30, 2021 at 08:40 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
1 product affected across 1 vendorHedgedoc

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.6%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.9.0
Affected range stops below 1.9.0, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatchThird Party Advisory
https://github.com/hedgedoc/hedgedoc/pull/1369
x_refsource_MISCPatchThird Party Advisory
https://github.com/hedgedoc/hedgedoc/pull/1375
x_refsource_MISCPatchThird Party Advisory
https://github.com/hedgedoc/hedgedoc/pull/1513

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-74CWE-346CWE-79

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