Medium severity · published Dec 18, 2019
CVE-2019-19775
The image thumbnailing handler in Zulip Server versions 1.9.0 to before 2.0.8 allowed an open redirect that was visible to logged-in users
6.1
CVSS
0.9%
EPSS
No
On KEV
Description
The image thumbnailing handler in Zulip Server versions 1.9.0 to before 2.0.8 allowed an open redirect that was visible to logged-in users.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZS
Zulip Server · Zulip
1.9.0 before 2.0.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19775
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19775
Release Notes
https://blog.zulip.org/2019/12/13/zulip-server-2-0-8-security-release/
Patch
https://github.com/zulip/zulip/commit/b7c87a4d82397a5e6ac169b6098bed0b1ae7a583
More from Zulip Server
9.8
CVE-2022-21706
Multi-use invitations can grant access to other organizations in Zulip
9.8
CVE-2019-18933
In Zulip Server versions from 1.7.0 to before 2.0.7, a bug in the new user signup process meant that users who registered their account using social authentication (e.g., GitHub…
8.8
CVE-2020-15070
Zulip Server 2.x before 2.1.7 allows eval injection if a privileged attacker were able to write directly to the postgres database, and chose to write a crafted custom profile…
8.8
CVE-2017-0910
In Zulip Server before 1.7.1, on a server with multiple realms, a vulnerability in the invitation system lets an authorized user of one realm on the server create a user account…
8.2
CVE-2025-31478
Zulip Authentication Backend Configuration Bypass