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Fencer Vulns
medium 6.1

CVE-2023-39703 json

A cross site scripting (XSS) vulnerability in the Markdown Editor component of Typora v1.6.7 allows attackers to execute arbitrary code via…

published 2023-09-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43403

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

A cross site scripting (XSS) vulnerability in the Markdown Editor component of Typora v1.6.7 allows attackers to execute arbitrary code via uploading a crafted Markdown file.

Patch / fix

  • typora typora 1.6.7

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • c0olw.github.io https://c0olw.github.io/2023/07/31/Typora-XSS-Vulnerability/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.