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Vulnerabilities

Vulnerability · CVE-2021-4457

The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file anywhere on the web server.

Published Jun 25, 2025 · catalog updated Jul 1, 2025 · Unknown ZoomSounds

Check if you run it

No confirmed exploitation is on record for CVE-2021-4457. EPSS is 0.44%. Act only if a listed version of Unknown ZoomSounds is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Version ranges on file
Affected products
vendor Unknown ZoomSounds 0 <6.05

The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file anywhere on the web server.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Unknown ZoomSounds 0 <6.050 <6.05

How to fix CVE-2021-4457

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-4457. EPSS is 0.44%. Act only if a listed version of Unknown ZoomSounds is installed.

Which versions are affected?

Compare what you have installed with Unknown ZoomSounds 0 <6.05 0 <6.05. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 25, 2025 · EUVD

    Detected

    The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file anywhere on the web server.

  2. Jul 1, 2025 · EUVD

    Updated

    The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file anywhere on the web server.

Sources

  • CVE.orgVulnerability recordCVE-2021-4457

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-4457

    30-day exploitation probability 0.44%

    first.org
  • EUVDVulnerability recordEUVD-2021-34682

    The ZoomSounds plugin before 6.05 contains a PHP file allowing unauthenticated users to upload an arbitrary file anywhere on the web server.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.