CVE-2022-36048

Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. When displaying messages with embedded remote images, Zulip normally loads the image preview via a go-camo proxy server. However, an attacker who can send messages could include a crafted URL that tricks the server into embedding a remote image reference directly. This could allow the attacker to infer the viewer’s IP address and browser fingerprinting information. This vulnerability is fixed in Zulip Server 5.6. Zulip organizations with image and link previews [disabled](https://zulip.com/help/allow-image-link-previews) are not affected.

Affected products

Zulip Server

Zulip

< 5.6

Fix

Available

CVSS 3.1

4.3 MEDIUM

EPSS

0.6% (46th percentile)

Weakness

CWE-436

NVD status

Modified

Published

2022-08-31

No exploit for CVE-2022-36048 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.