CVE-2023-5311

Name: CVE-2023-5311
Creator: NVD / NIST
Published: 2023-10-25T18:17:43.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2023-5311 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The WP EXtra plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the register() function in versions up to, and including, 6.2. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to modify the contents of the .htaccess files located in a site's root directory or /wp-content and /wp-includes folders and achieve remote code execution. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

The WP EXtra plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the register() function in versions up to, and including, 6.2. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to modify the contents of the .htaccess files located in a site's root directory or /wp-content and /wp-includes folders and achieve remote code execution. CVE-2023-46623 appears to be a duplicate of this issue.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.46%

70.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wpvnteam	Wp Extra	< 6.3

References

https://giongfnef.gitbook.io/giongfnef/cve/cve-2023-5311Exploit, Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2977703/wp-extraPatch
https://www.wordfence.com/threat-intel/vulnerabilities/id/87e3dd5e-0d77-4d78-8171-0beaf9482699?source=cvePatch, Third Party Advisory
https://giongfnef.gitbook.io/giongfnef/cve/cve-2023-5311Exploit, Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2977703/wp-extraPatch
https://www.wordfence.com/threat-intel/vulnerabilities/id/87e3dd5e-0d77-4d78-8171-0beaf9482699?source=cvePatch, Third Party Advisory

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5311?

How severe is CVE-2023-5311?

CVE-2023-5311 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5311?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5311?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST