How severe is CVE-2021-4449?

CVE-2021-4449 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-4449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4449?

CVE-2021-4449 affects Digitalzoomstudio Zoomsounds. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4449?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2021-4449 have an EU (EUVD) identifier?

Yes. CVE-2021-4449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34634.

When was CVE-2021-4449 published?

CVE-2021-4449 was published on 2024-10-16 and last updated on 2026-06-17.

CVE-2021-4449

CVE-2021-4449 is a critical-severity vulnerability in Digitalzoomstudio Zoomsounds with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34634
Weakness: CWE-434
Affected product: Digitalzoomstudio Zoomsounds
Published: 2024-10-16
Last modified: 2026-06-17

Description

The ZoomSounds plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'savepng.php' file in versions up to, and including, 5.96. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2021-4457 is a duplicate of this.

Frequently asked questions

What is CVE-2021-4449?: The ZoomSounds plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'savepng.php' file in versions up to, and including, 5.96. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2021-4457 is a duplicate of this.
How severe is CVE-2021-4449?: CVE-2021-4449 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-4449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4449?: CVE-2021-4449 affects Digitalzoomstudio Zoomsounds. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2021-4449 have an EU (EUVD) identifier?: Yes. CVE-2021-4449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34634.
When was CVE-2021-4449 published?: CVE-2021-4449 was published on 2024-10-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:digitalzoomstudio:zoomsounds:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Digitalzoomstudio Zoomsounds

CVE-2025-47568 — Critical (CVSS 9.8): Deserialization of Untrusted Data vulnerability in ZoomIt ZoomSounds dzs-zoomsounds allows Object Injection.This issue…
CVE-2015-9471 — Critical (CVSS 9.8): The dzs-zoomsounds plugin through 2.0 for WordPress has admin/upload.php arbitrary file upload.
CVE-2021-4457 — Critical (CVSS 9.1): The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file…
CVE-2024-13776 — High (CVSS 8.1): The ZoomSounds - WordPress Wave Audio Player with Playlist plugin for WordPress is vulnerable to unauthorized…
CVE-2024-13777 — High (CVSS 8.1): The ZoomSounds - WordPress Wave Audio Player with Playlist plugin for WordPress is vulnerable to PHP Object Injection…
CVE-2025-3431 — High (CVSS 7.5): The ZoomSounds - WordPress Wave Audio Player with Playlist plugin for WordPress is vulnerable to Arbitrary File Read in…

All CVEs affecting Digitalzoomstudio Zoomsounds →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →