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CVE-2021-43721

MEDIUMCVSS 6.1/10EPSS 0.99%

Last modified

CVE-2021-43721 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Leanote 2.7.0 is vulnerable to Cross Site Scripting (XSS) in the markdown type note. This leads to remote code execution with payload : <video src=x onerror=(function(){require('child_process').exec('calc');})();>. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

Leanote 2.7.0 is vulnerable to Cross Site Scripting (XSS) in the markdown type note. This leads to remote code execution with payload : <video src=x onerror=(function(){require('child_process').exec('calc');})();>

Metrics

CVSS 3.1
6.1/10

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

EPSS Probability
0.99%

58.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LeanoteLeanote2.7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-43721?
Leanote 2.7.0 is vulnerable to Cross Site Scripting (XSS) in the markdown type note. This leads to remote code execution with payload : <video src=x onerror=(function(){require('child_process').exec('calc');})();>
How severe is CVE-2021-43721?
CVE-2021-43721 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43721?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43721?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST