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CVE-2019-19775

21
FAUCET Score

CVE-2019-19775 describes an open redirect vulnerability in Zulip Server versions 1.9.0 through 2.0.7, specifically within its image thumbnailing handler. This medium-severity vulnerability (CVSS 6.1) allows an attacker to redirect logged-in users to arbitrary external sites, potentially leading to phishing or credential theft. While the attack complexity is low and requires user interaction, it does not impact confidentiality or integrity significantly. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.9.0, < 2.0.8CPE matchmatch criteria
cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 65th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

blog.zulip.org / 2019/12/13/zulip-server-2-0-8-security-release
Release NotesVendor Advisory
github.com / zulip/zulip/commit/b7c87a4d82397a5e6ac169b6098bed0b1ae7a583
PatchThird Party Advisory