CVEvulnerability
CVE-2019-16216
5.4 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2019-09-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CVSS 2.0 ([email protected])
- 3.5 LOW — AV:N/AC:M/Au:S/C:N/I:P/A:N
- Weaknesses
- CWE-79
Description
Zulip server before 2.0.5 incompletely validated the MIME types of uploaded files. A user who is logged into the server could upload files of certain types to mount a stored cross-site scripting attack on other logged-in users. On a Zulip server using the default local uploads backend, the attack is only effective against browsers lacking support for Content-Security-Policy such as Internet Explorer 11. On a Zulip server using the S3 uploads backend, the attack is confined to the origin of the configured S3 uploads hostname and cannot reach the Zulip server itself.
Affected configurations
• zulip zulip server (>= 1.8.0 < 2.0.5)
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ Vendor Advisory
- https://github.com/zulip/zulip/commit/1195841dfb9aa26b3b0dabc6f05d72e4af25be3e Patch, Third Party Advisory
- https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ Vendor Advisory
- https://github.com/zulip/zulip/commit/1195841dfb9aa26b3b0dabc6f05d72e4af25be3e Patch, Third Party Advisory