CVE-2021-36921: AIMANAGER before B115 on MONITORAPP Application Insight Web Application Firewall (AIWAF) devices with Manager

This month

HIGH 8.8UPGRADE

CVE-2021-36921 is a high-severity flaw (CVSS 8.8) affecting application insight manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AIMANAGER before B115 on MONITORAPP Application Insight Web Application Firewall (AIWAF) devices with Manager 2.1.0 has Improper Authentication. An attacker can gain administrative access by modifying the response to an authentication check request.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-287
Published	2021-08-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: monitorapp

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

Am I affected?

Timeline

2021-08-12 18:15 UTCPublished CVE record published
2026-06-17 03:59 UTCUpdated Record last modified

monitorapp application insight manager UPGRADE

Affected: >= b107 and < b115

Fixed in: b115

Safe to downgrade to: a release before b107

1. Check installed version

apt-cache policy application-insight-manager || rpm -q application-insight-manager || application-insight-manager --version

2. UPGRADE to b115 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade application-insight-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade application-insight-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before b107 (Debian / Ubuntu)

apt-cache madison application-insight-manager sudo apt install application-insight-manager=<VERSION_BEFORE_b107> sudo apt-mark hold application-insight-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list application-insight-manager sudo dnf downgrade application-insight-manager-<VERSION_BEFORE_b107> sudo dnf versionlock add application-insight-manager

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-2021-36921?

application insight manager: upgrade to b115. Exact commands for each OS are on this page.

Is CVE-2021-36921 being exploited?

CVE-2021-36921 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-2021-36921 affect?

CVE-2021-36921 affects application insight manager. Severity is high (CVSS 8.8). AIMANAGER before B115 on MONITORAPP Application Insight Web Application Firewall (AIWAF) devices with Manager 2.1.0 has Improper Authentication. An attacker can gain administrative access by modifying the response to an authentication check

How urgent is CVE-2021-36921?

Priority 49/100. High severity

Related CVEs

CVE-2021-36982 HIGH 8.1 UPGRADE AIMANAGER before B115 on MONITORAPP Application Insight Web Application Firewall (AIWAF) devices with Manager

References

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