CVE-2019-16216: 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…

PriorityP426medium5.4CVSS 3.1

AVNACLPRLUIRSCCLILAN

EPSS

0.68%

47.8th percentile

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

1 ranges

Vendor	Product	Version range	Fixed in
zulip	zulip_server	>= 1.8.0 < 2.0.5	2.0.5

CVSS provenance

nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

nvdv2.03.5LOWAV:N/AC:M/Au:S/C:N/I:P/A:N

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