What is CVE-2019-16907?

CVE-2019-16907 is a medium-severity vulnerability in Infosysta In-App \& Desktop Notifications, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2019-10-31.

How severe is CVE-2019-16907?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Infosysta In-App \& Desktop Notifications

CVE-2019-16907

An issue was discovered in the Infosysta "In-App & Desktop Notifications" app 1.6.13_J8 for Jira. It is possible to obtain a list of all valid Jira usernames without authentication/authorization via the plugins/servlet/nfj/UserFilter?searchQuery=@ URI.

Vulnerability class: Broken Authentication

Published 2019-10-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Infosysta In-App \& Desktop Notifications — versions 1.6.13_j8

Weakness classification (CWE)

References

packetstormsecurity.com/files/154993/Infosysta-Jira-1.6.13_J8-User-Name-Disclos… (Exploit, VDB Entry, Third Party Advisory)
seclists.org/bugtraq/2019/Nov/0 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16907?: CVE-2019-16907 is a medium-severity vulnerability in Infosysta In-App \& Desktop Notifications, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2019-10-31.
How severe is CVE-2019-16907?: Medium severity. CVSS v3 base score is 5.3 out of 10.