CVE-2021-20727

MEDIUM
6.1
CVSS Score
Published: May 27, 2021 at 08:05 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
2 products affected across 2 vendorsZettlrZettlr

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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0.20.0 ≤ v ≤ 1.8.8
0.20.0 ≤ v ≤ 1.8.8

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCThird Party Advisory
https://github.com/Zettlr/Zettlr
x_refsource_MISCThird Party Advisory
https://jvn.jp/en/jp/JVN98239374/index.html
x_refsource_MISCProduct
https://www.zettlr.com/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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