CVE-2021-4354

Name: CVE-2021-4354
Creator: NVD / NIST
Published: 2023-06-07T02:15:13.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.82%

Last modified Jun 17, 2026

CVE-2021-4354 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The PWA for WP & AMP for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the pwaforwp_splashscreen_uploader function in versions up to, and including, 1.7.32. This makes it possible for authenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

The PWA for WP & AMP for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the pwaforwp_splashscreen_uploader function in versions up to, and including, 1.7.32. This makes it possible for authenticated attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.

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

1.82%

76.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Magazine3	Pwa For Wp \& Amp	< 1.7.33

References

https://blog.nintechnet.com/wordpress-pwa-for-wp-and-amp-plugin-fixed-vulnerabilities/Exploit, Third Party Advisory
https://www.wordfence.com/threat-intel/vulnerabilities/id/6082791e-feac-41f7-b565-9d98624ddf50?source=cveThird Party Advisory
https://blog.nintechnet.com/wordpress-pwa-for-wp-and-amp-plugin-fixed-vulnerabilities/Exploit, Third Party Advisory
https://www.wordfence.com/threat-intel/vulnerabilities/id/6082791e-feac-41f7-b565-9d98624ddf50?source=cveThird Party Advisory

Timeline

Published: Jun 7, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4354?

How severe is CVE-2021-4354?

CVE-2021-4354 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4354?

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-2021-4354?

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

Scan your code now

Source: NVD / NIST