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.
Metrics
Affected Vendors & Products
References
History
No history.
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T01:10:41.549Z
Reserved: 2019-09-11T00:00:00
Link: CVE-2019-16216
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Status : Modified
Published: 2019-09-18T12:15:10.990
Modified: 2024-11-21T04:30:17.553
Link: CVE-2019-16216
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