CVE-2021-44935: glFusion CMS v1.7.9 is affected by an arbitrary user impersonation vulnerability in /public_html/comment.php

This week

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2021-44935 is a critical-severity flaw (CVSS 9.1) affecting glfusion. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

glFusion CMS v1.7.9 is affected by an arbitrary user impersonation vulnerability in /public_html/comment.php. The attacker can complete the attack remotely without interaction.

Why this priority

Critical severity
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	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-346
Published	2021-12-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: glfusion

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

Am I affected?

Timeline

2021-12-14 13:15 UTCPublished CVE record published
2026-06-17 04:12 UTCUpdated Record last modified

glfusion glfusion DOWNGRADE

Affected: 1.7.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.7.9 (Debian / Ubuntu)

apt-cache madison glfusion sudo apt install glfusion=<VERSION_BEFORE_1.7.9> sudo apt-mark hold glfusion

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

dnf --showduplicates list glfusion sudo dnf downgrade glfusion-<VERSION_BEFORE_1.7.9> sudo dnf versionlock add glfusion

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-2021-44935?

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

Is CVE-2021-44935 being exploited?

CVE-2021-44935 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-2021-44935 affect?

CVE-2021-44935 affects glfusion. Severity is critical (CVSS 9.1). glFusion CMS v1.7.9 is affected by an arbitrary user impersonation vulnerability in /public_html/comment.php. The attacker can complete the attack remotely without interaction.

How urgent is CVE-2021-44935?

Priority 53/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-45843 MEDIUM 6.1 DOWNGRADE glFusion CMS v1.7.9 is affected by a reflected Cross Site Scripting (XSS) vulnerability
CVE-2021-44949 CRITICAL 9.8 DOWNGRADE glFusion CMS 1.7.9 is affected by an access control vulnerability via /public_html/users.php.
CVE-2021-44942 MEDIUM 4.3 DOWNGRADE glFusion CMS 1.7.9 is affected by a Cross Site Request Forgery (CSRF) vulnerability in /public_html/admin/plug
CVE-2021-44937 MEDIUM 5.3 DOWNGRADE glFusion CMS v1.7.9 is affected by an arbitrary user registration vulnerability in /public_html/users.php

References

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