XSS in Hendrik Erz Zettlr
CVE-2021-20727
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.010 (61.0th 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
- Hendrik Erz Zettlr — versions from 0.20.0 to 1.8.8
- Zettlr
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vultures@jpcert.or.jp (Product, x_refsource_MISC)
- vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)
- vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-20727?
- CVE-2021-20727 is a medium-severity vulnerability in Hendrik Erz Zettlr, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-27.
- How severe is CVE-2021-20727?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-20727 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.