CVE-2020-12759

Name: CVE-2020-12759
Creator: NVD / NIST
Published: 2020-08-21T05:15:11.483+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2020-12759 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.

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

0.67%

47.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Zulip	Zulip Server	< 2.1.5

References

https://blog.zulip.com/2020/06/17/zulip-server-2-1-5-security-release/Release Notes, Vendor Advisory
https://blog.zulip.com/2020/06/17/zulip-server-2-1-5-security-release/Release Notes, Vendor Advisory

Timeline

Published: Aug 21, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12759?

Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.

How severe is CVE-2020-12759?

CVE-2020-12759 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12759?

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-2020-12759?

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

Scan your code now

Source: NVD / NIST