CVE-2022-36048
mediumpriority · track · 17EPSS 0.006 · 51 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (5)
External citations — patches, advisories, analysis.
- https://blog.zulip.com/2022/08/24/zulip-server-5-6-security-release/Patchcnnvd
- https://cxsecurity.com/cveshow/CVE-2022-36048/cnnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-vg5m-mf9x-j452cnnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-vg5m-mf9x-j452enisa_euvd
- https://github.com/zulip/zulip/security/advisories/GHSA-vg5m-mf9x-j452Third Party Advisorynvd
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