CVE-2021-26835

6.1 mediumEPSS 1.3%

Medium (6.1) in zettlr zettlr. EPSS 1.3% chance of exploitation in the next 30 days.

No filtering of cross-site scripting (XSS) payloads in the markdown-editor in Zettlr 1.8.7 allows attackers to perform remote code execution via a crafted file.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-06-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zettlr:zettlr

References

https://github.com/Zettlr/Zettlr/issues/1716
https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9
https://github.com/Zettlr/Zettlr/issues/1716
https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9

Check your stack JSON