CVE-2021-34626: A vulnerability in the deleteCustomType function of the WP Upload Restriction WordPress plugin allows low-leve

Q: How do I fix CVE-2021-34626?

wp-upload-restriction: upgrade to newer than 2.2.3. Exact commands for each OS are on this page.

Q: Is CVE-2021-34626 being exploited?

CVE-2021-34626 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-2021-34626 affect?

CVE-2021-34626 affects wp-upload-restriction. Severity is medium (CVSS 4.3). A vulnerability in the deleteCustomType function of the WP Upload Restriction WordPress plugin allows low-level authenticated users to delete custom extensions added by administrators. This issue affects versions 2.2.3 and prior.

Q: How urgent is CVE-2021-34626?

Priority 33/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2021-34626 is a medium-severity flaw (CVSS 4.3) affecting wp-upload-restriction. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the deleteCustomType function of the WP Upload Restriction WordPress plugin allows low-level authenticated users to delete custom extensions added by administrators. This issue affects versions 2.2.3 and prior.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-284
Published	2021-07-07
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: wp-upload-restriction project

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

Am I affected?

Timeline

2021-07-07 13:15 UTCPublished CVE record published
2026-06-17 03:56 UTCUpdated Record last modified

wp-upload-restriction project wp-upload-restriction UPGRADE

Affected: <= 2.2.3

Fixed in: newer than 2.2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wp-upload-restriction || rpm -q wp-upload-restriction || wp-upload-restriction --version

2. UPGRADE to newer than 2.2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wp-upload-restriction

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wp-upload-restriction

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-2021-34626?

wp-upload-restriction: upgrade to newer than 2.2.3. Exact commands for each OS are on this page.

Is CVE-2021-34626 being exploited?

CVE-2021-34626 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-2021-34626 affect?

CVE-2021-34626 affects wp-upload-restriction. Severity is medium (CVSS 4.3). A vulnerability in the deleteCustomType function of the WP Upload Restriction WordPress plugin allows low-level authenticated users to delete custom extensions added by administrators. This issue affects versions 2.2.3 and prior.

How urgent is CVE-2021-34626?

Priority 33/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-34627 MEDIUM 4.3 UPGRADE A vulnerability in the getSelectedMimeTypesByRole function of the WP Upload Restriction WordPress plugin allow
CVE-2021-34625 MEDIUM 6.4 UPGRADE A vulnerability in the saveCustomType function of the WP Upload Restriction WordPress plugin allows low-level

References

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