Vulnerability · Published Jan 16, 2025 · Assigned by GitHub_M

CVE-2024-56136/api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server

Medium 6.9

In plain English

A medium-severity information exposure in zulip from zulip. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.6%top 51.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.

Affected products (as reported)

Vendor	Product	Versions
zulip	zulip	>= 7.0, < 9.4

Weakness: CWE-200 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6 x_refsource_CONFIRM
https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4d x_refsource_MISC