PT-2023-18871 · Typora · Typora

Cursered + 1 · Published 2023-08-18 · Updated 2023-08-28 · CVE-2023-2317

Positive Technologies (AI Summary)

CVSS v3.1

9.6

Critical

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Typora versions prior to 1.6.7

Description The issue allows a crafted markdown file to run arbitrary JavaScript code in the context of Typora's main window via loading typora://app/typemark/updater/update.html in an <embed> tag. This can be exploited if a user opens a malicious markdown file in Typora or copies text from a malicious webpage and pastes it into Typora.

Recommendations For versions prior to 1.6.7, update to version 1.6.7 or later to resolve the issue. As a temporary workaround, consider avoiding the use of the <embed> tag with typora://app/typemark/updater/update.html until a patch is applied. Additionally, users should be cautious when opening markdown files from untrusted sources or copying text from potentially malicious webpages.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-2317

Affected Products

Typora

References · 9

• 🔥 https://starlabs.sg/advisories/23/23-2317 · Exploit
• https://osv.dev/vulnerability/CVE-2023-2317 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-2317 · Security Note
• https://support.typora.io/What\'s-New-1.6 · Vendor Advisory
• https://twitter.com/geekphane/status/1693859661701620051 · Twitter Post
• https://twitter.com/sirifu4k1/status/1696078231546609994 · Twitter Post
• https://twitter.com/buaqbot/status/1695780995943837955 · Twitter Post
• https://t.me/cibsecurity/68857 · Telegram Post
• https://twitter.com/CVEnew/status/1692776754778120250 · Twitter Post