PT-2020-12434 · Zulip · Zulip Server

Published 2020-04-20 · Updated 2020-04-28 · CVE-2020-10935

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zulip Server versions prior to 2.1.3

Description The issue allows for cross-site scripting (XSS) via a Markdown link. This can result in account takeover.

Recommendations For versions prior to 2.1.3, update to version 2.1.3 or later to resolve the issue. As a temporary workaround, consider restricting the use of Markdown links until the update is applied.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-10935

Affected Products

Zulip Server

References · 4

• 🔥 https://coresecurity.com/advisories/zulip-account-takeover-stored-xss · Exploit
• https://blog.zulip.org/2020/04/01/zulip-server-2-1-3-security-release · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10935 · Security Note
• https://osv.dev/vulnerability/CVE-2020-10935 · Vendor Advisory