Arbitrary file upload in Zulip
CVE-2022-31134
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
- Zulip — versions >= 2.1.0, < 5.4
- Zulip Server
Weakness classification (CWE)
References
- github.com/zulip/zulip/security/advisories/GHSA-58pm-88xp-7x9m (Third Party Advisory, Release Notes)
- blog.zulip.com/2022/07/12/zulip-cloud-data-exports (Vendor Advisory)
- blog.zulip.com/2022/07/12/zulip-server-5-4-security-release (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-31134?
- CVE-2022-31134 is a medium-severity vulnerability in Zulip, classified under Information Disclosure. CVSS score: 4.9/10. Published 2022-07-12.
- How severe is CVE-2022-31134?
- Medium severity. CVSS v3 base score is 4.9 out of 10.