Typora DOM-Based Cross-site Scripting leading to Remote Code Execution
CVE-2023-2317

8.6HIGH

Key Information:

Vendor

Typora

Status
Typora
Vendor
CVE Published:
19 August 2023

What is CVE-2023-2317?

Typora, a popular markdown editor, has a vulnerability that allows DOM-based Cross-Site Scripting (XSS) through the updater interface. On Windows and Linux systems, if a user opens a specially crafted markdown file or pastes text from a compromised webpage into Typora, arbitrary JavaScript code can be executed within the context of the Typora main window. This exploitation occurs via the loading of the updater page through the 'typora://app/typemark/updater/update.html' embedded tag, potentially leading to severe misuse of the application.

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Affected Version(s)

Typora Windows 0 < 1.6.7

References

https://support.typora.io/What's-New-1.6/
release-notes
https://starlabs.sg/advisories/23/23-2317/
third-party-advisory

EPSS Score

49% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Li Jiantao (@CurseRed) of STAR Labs SG Pte. Ltd. (@starlabs_sg)
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