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Medium severity6.1NVD Advisory· Published May 27, 2021· Updated Jun 17, 2026

CVE-2021-20727

CVE-2021-20727

Description

Cross-site scripting vulnerability in Zettlr from 0.20.0 to 1.8.8 allows an attacker to execute an arbitrary script by loading a file or code snippet containing an invalid iframe into Zettlr.

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Affected products

3
  • Zettlr/Zettlr2 versions
    cpe:2.3:a:zettlr:zettlr:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:zettlr:zettlr:*:*:*:*:*:*:*:*range: >=0.20.0,<=1.8.8
    • (no CPE)range: 0.20.0 - 1.8.8
  • Hendrik Erz/Zettlrv5
    Range: from 0.20.0 to 1.8.8

Patches

Vulnerability mechanics

References

2

News mentions

0

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