Vulnerability · Published Jul 12, 2022 · Assigned by GitHub_M

CVE-2022-31134Zulip Server public data export contains attachments that are non-public

Medium 4.9

In plain English

A medium-severity information exposure in zulip from zulip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.9%top 39.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Zulip is an open-source team collaboration tool. Zulip Server versions 2.1.0 above have a user interface tool, accessible only to server owners and server administrators, which provides a way to download a "public data" export. While this export is only accessible to administrators, in many configurations server administrators are not expected to have access to private messages and private streams. However, the "public data" export which administrators could generate contained the attachment contents for all attachments, even those from private messages and streams. Zulip Server version 5.4 contains a patch for this issue.

Affected products (as reported)

Vendor	Product	Versions
zulip	zulip	>= 2.1.0, < 5.4

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/zulip/zulip/security/advisories/GHSA-58pm-88xp-7x9m x_refsource_CONFIRM
https://blog.zulip.com/2022/07/12/zulip-cloud-data-exports x_refsource_MISC
https://blog.zulip.com/2022/07/12/zulip-server-5-4-security-release x_refsource_MISC