CVE-2025-4857: newsletters Path Traversal — Fix

Description

The Newsletters plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.9.9.9 via the 'file' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included.

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CVSS v3.1 Score

7.2

HIGH

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

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
tribulant	newsletters	< 4.10

References

Advisories & Patches

https://plugins.trac.wordpress.org/changeset/3303758/

Other References

https://plugins.trac.wordpress.org/browser/newsletters-lite/trunk/wp-mailinglist.php#L1584 https://www.wordfence.com/threat-intel/vulnerabilities/id/33c0838a-5f86-4368-8bf9-da0582acbabf?source=cve

Frequently Asked Questions

What is CVE-2025-4857? +

The Newsletters plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.9.9.9 via the 'file' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2025-4857? +

CVE-2025-4857 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-4857? +

CVE-2025-4857 affects products from tribulant, specifically: newsletters. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4857? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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