CVE-2019-19249: Controllers/InvitationsController.cs in QueryTree before 3.0.99-beta mishandles invitations.

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2019-19249 is a critical-severity flaw (CVSS 9.8) affecting querytree. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Controllers/InvitationsController.cs in QueryTree before 3.0.99-beta mishandles invitations.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-20
Published	2019-11-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: querytreeapp

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

Am I affected?

Timeline

2019-11-25 17:15 UTCPublished CVE record published
2026-06-17 02:26 UTCUpdated Record last modified

querytreeapp querytree DOWNGRADE

Affected: 3.0.11 beta · 3.0.13 beta · 3.0.15 beta · 3.0.17 beta · 3.0.19 beta · 3.0.21 beta · 3.0.25 beta · 3.0.27 beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.11

1. Check installed version

apt-cache policy querytree || rpm -q querytree || querytree --version

2. No fixed release: DOWNGRADE to a release before 3.0.11 (Debian / Ubuntu)

apt-cache madison querytree sudo apt install querytree=<VERSION_BEFORE_3.0.11> sudo apt-mark hold querytree

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

dnf --showduplicates list querytree sudo dnf downgrade querytree-<VERSION_BEFORE_3.0.11> sudo dnf versionlock add querytree

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-2019-19249?

querytree: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-19249 being exploited?

CVE-2019-19249 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-2019-19249 affect?

CVE-2019-19249 affects querytree. Severity is critical (CVSS 9.8). Controllers/InvitationsController.cs in QueryTree before 3.0.99-beta mishandles invitations.

How urgent is CVE-2019-19249?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

References

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