Medium severity6.1NVD Advisory· Published Jun 18, 2021· Updated Jun 17, 2026

CVE-2021-26835

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zettlr/Zettlr3 versions
cpe:2.3:a:zettlr:zettlr:1.8.7:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:zettlr:zettlr:1.8.7:*:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: <1.8.7

Patches

Vulnerability mechanics

References

github.com/Zettlr/Zettlr/issues/1716nvdExploitIssue TrackingPatchThird Party Advisory
github.com/Zettlr/Zettlr/releases/tag/v1.8.9nvdRelease NotesThird Party Advisory

News mentions

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cvss	0.397
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000