What is CVE-2022-36048?

CVE-2022-36048 is a medium-severity vulnerability in Zulip, classified under CWE-436. CVSS score: 4.3/10. Published 2022-08-31.

How severe is CVE-2022-36048?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Zulip

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.

EPSS: 0.005 (40.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Zulip — versions < 5.6

Weakness classification (CWE)

CWE-436

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2022-36048?: CVE-2022-36048 is a medium-severity vulnerability in Zulip, classified under CWE-436. CVSS score: 4.3/10. Published 2022-08-31.
How severe is CVE-2022-36048?: Medium severity. CVSS v3 base score is 4.3 out of 10.