CVE-2020-24582

Name: CVE-2020-24582
Creator: NVD / NIST
Published: 2020-09-10T17:15:32.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2020-24582 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Zulip Desktop before 5.4.3 allows XSS because string escaping is mishandled during composition of the HTML for the user interface.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

Zulip Desktop before 5.4.3 allows XSS because string escaping is mishandled during composition of the HTML for the user interface.

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

0.69%

47.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Zulipchat	Zulip Desktop	< 5.4.3

References

https://blog.zulip.com/2020/09/10/zulip-desktop-5-4-3-security-release/Release Notes, Vendor Advisory
https://blog.zulip.com/2020/09/10/zulip-desktop-5-4-3-security-release/Release Notes, Vendor Advisory

Timeline

Published: Sep 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24582?

Zulip Desktop before 5.4.3 allows XSS because string escaping is mishandled during composition of the HTML for the user interface.

How severe is CVE-2020-24582?

CVE-2020-24582 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24582?

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-2020-24582?

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

Scan your code now

Source: NVD / NIST