PT-2021-17158 · Zettlr · Zettlr

Soulfoodisgood · Published 2021-06-18 · Updated 2021-06-21 · CVE-2021-26835

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Zettlr version 1.8.7

Description: The issue is related to the lack of filtering of cross-site scripting (XSS) payloads in the markdown-editor, allowing attackers to perform remote code execution via a crafted file.

Recommendations: For Zettlr version 1.8.7, update to a version that includes a fix for the XSS filtering issue in the markdown-editor to prevent remote code execution.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-26835

Affected Products

Zettlr

References · 5

• 🔥 https://github.com/Zettlr/Zettlr/issues/1716 · Exploit
• https://osv.dev/vulnerability/CVE-2021-26835 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26835 · Security Note
• https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9 · Note
• https://t.me/cvenotify/16575 · Telegram Post