CVE-2019-16907: An issue was discovered in the Infosysta "In-App & Desktop Notifications" app 1.6.13_J8 for Jira

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2019-16907 is a medium-severity flaw (CVSS 5.3) affecting in-app \& desktop notifications. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-306, CWE-862
Published	2019-10-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: infosysta

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-10-31 22:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

infosysta in-app \& desktop notifications DOWNGRADE

Affected: 1.6.13_j8

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.13_j8

1. Check installed version

apt-cache policy in-app--desktop-notifications || rpm -q in-app--desktop-notifications || in-app--desktop-notifications --version

2. No fixed release: DOWNGRADE to a release before 1.6.13_j8 (Debian / Ubuntu)

apt-cache madison in-app--desktop-notifications sudo apt install in-app--desktop-notifications=<VERSION_BEFORE_1.6.13_j8> sudo apt-mark hold in-app--desktop-notifications

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list in-app--desktop-notifications sudo dnf downgrade in-app--desktop-notifications-<VERSION_BEFORE_1.6.13_j8> sudo dnf versionlock add in-app--desktop-notifications

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-16907?

in-app \& desktop notifications: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-16907 being exploited?

CVE-2019-16907 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-16907 affect?

CVE-2019-16907 affects in-app \& desktop notifications. Severity is medium (CVSS 5.3). 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?search

How urgent is CVE-2019-16907?

Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Atlassian Jira vulnerabilities

Related CVEs

CVE-2019-16909 MEDIUM 4.3 UPGRADE An issue was discovered in the Infosysta "In-App & Desktop Notifications" app before 1.6.14_J8 for Jira
CVE-2019-16908 MEDIUM 5.3 UPGRADE An issue was discovered in the Infosysta "In-App & Desktop Notifications" app before 1.6.14_J8 for Jira
CVE-2019-16906 HIGH 7.5 DOWNGRADE An issue was discovered in the Infosysta "In-App & Desktop Notifications" app 1.6.13_J8 for Jira

References

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