Reported vulnerability

WordPress Core 5.8 beta - Block Editor Authorization Bypass

Published 9 Sept 2021

Updated 6 Feb 2024

CVE-2021-39203

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 6.8

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions authenticated users who don't have permission to view private post types/data can bypass restrictions in the block editor under certain conditions. This affected WordPress 5.8 beta during the testing period. It's fixed in the final 5.8 release.

Severity vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

WordPress

Software: WordPress Core · wordpress
Affected versions: From 5.8 beta 1, through 5.8 beta 1
Fix availability: Fix available
Fixed versions: 5.8

Recommended action

Update to version 5.8, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/6ed9a567-fde4-4b6f-81c1-423c5cbba0a9?source=api-prod

Data sources and licences

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Source: Wordfence

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Questions about this vulnerability

Which versions of WordPress are affected?

Wordfence lists these affected versions: From 5.8 beta 1, through 5.8 beta 1. Use the version checker above to compare your installed release with this report.

Is a fix available for WordPress?

Wordfence reports a fix for this issue in WordPress. It lists these fixed versions: 5.8. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed WordPress version?

In WordPress, open Dashboard > Updates to find your installed WordPress version.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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