CVE-2021-26835 — MEDIUM (6.1)

Vulnerability Description

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.

CVSS Score

6.1

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Zettlr	Zettlr	1.8.7

Related Weaknesses (CWE)

CWE-79

References

https://github.com/Zettlr/Zettlr/issues/1716ExploitIssue TrackingPatch
https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9Release NotesThird Party Advisory
https://github.com/Zettlr/Zettlr/issues/1716ExploitIssue TrackingPatch
https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9Release NotesThird Party Advisory

FAQ

What is CVE-2021-26835?

CVE-2021-26835 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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.

How severe is CVE-2021-26835?

CVE-2021-26835 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-26835?

Check the references section above for vendor advisories and patch information. Affected products include: Zettlr Zettlr.