What is CVE-2021-26835?

CVE-2021-26835 is a medium-severity vulnerability in Zettlr, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-18.

How severe is CVE-2021-26835?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Zettlr

CVE-2021-26835

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.013 (67.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Zettlr — versions 1.8.7
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2021-26835?: CVE-2021-26835 is a medium-severity vulnerability in Zettlr, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-18.
How severe is CVE-2021-26835?: Medium severity. CVSS v3 base score is 6.1 out of 10.