CVE-2021-24638: The OMGF WordPress plugin before 4.5.4 does not escape or validate the handle parameter of the REST API, which

Q: How do I fix CVE-2021-24638?

omgf: upgrade to 4.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-24638 being exploited?

CVE-2021-24638 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24638 affect?

CVE-2021-24638 affects omgf. Severity is critical (CVSS 9.1). The OMGF WordPress plugin before 4.5.4 does not escape or validate the handle parameter of the REST API, which allows unauthenticated users to perform path traversal and overwrite arbitrary CSS file with Google Fonts CSS, or download fonts

Q: How urgent is CVE-2021-24638?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.1REMOTEUPGRADE

CVE-2021-24638 is a critical-severity flaw (CVSS 9.1) affecting omgf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The OMGF WordPress plugin before 4.5.4 does not escape or validate the handle parameter of the REST API, which allows unauthenticated users to perform path traversal and overwrite arbitrary CSS file with Google Fonts CSS, or download fonts uploaded on Google Fonts website.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-22
Published	2021-09-20
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: ffw

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

Am I affected?

Timeline

2021-09-20 10:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

ffw omgf UPGRADE

Affected: < 4.5.4

Fixed in: 4.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade omgf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade omgf

Note

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

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-2021-24638?

omgf: upgrade to 4.5.4. Exact commands for each OS are on this page.

Is CVE-2021-24638 being exploited?

CVE-2021-24638 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-2021-24638 affect?

CVE-2021-24638 affects omgf. Severity is critical (CVSS 9.1). The OMGF WordPress plugin before 4.5.4 does not escape or validate the handle parameter of the REST API, which allows unauthenticated users to perform path traversal and overwrite arbitrary CSS file with Google Fonts CSS, or download fonts

How urgent is CVE-2021-24638?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2023-6600 HIGH 8.6 UPGRADE The OMGF | GDPR/DSGVO Compliant, Faster Google Fonts
CVE-2021-24639 HIGH 8.1 UPGRADE The OMGF WordPress plugin before 4.5.4 does not enforce path validation, authorisation and CSRF checks in the

References

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