Cross-site scripting in HedgeDoc - #VU127925
Published: April 25, 2026
Vulnerability identifier: #VU127925
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: HedgeDoc
Affected software:
HedgeDoc
HedgeDoc
Detailed vulnerability description
The vulnerability allows a remote attacker to trigger browser actions and initiate limited cross-site side effects.
The vulnerability exists due to cross-site scripting in iframe embeddings when rendering embedded webpages. A remote attacker can embed a specially crafted webpage in an iframe to trigger browser actions and initiate limited cross-site side effects.
User interaction is required, and the issue affects instances that allow iframe usage.
Remediation
Install security update from vendor's website.