Easy Waveform Player contributors can store cross-site scripting payloads

Easy Waveform Player through 1.2.2 does not safely sanitize and escape values handled by shortcode_easywaveformplayer(). A Contributor or higher can store script in a page, and the payload executes whenever a visitor opens the affected page.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Easy Waveform Player
Plugin slug: easy-waveform-player
Affected: <= 1.2.2
Safe version: 1.2.3
Published: Sep 02, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Sep 02, 2026 and is one of 2 known issues for this plugin.

What to do

Update, patch or deactivate.

The official author release notes confirm remediation by 1.2.3; this does not establish that every intervening release was affected. Update the affected edition to 1.2.3 or a later maintained release on its supported branch. Disable the affected shortcode or remove the plugin, review Contributor-authored content, and investigate privileged activity after affected pages were viewed. Official author release notes: https://wordpress.org/plugins/easy-waveform-player/.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Easy Waveform Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the shortcode_easywaveformplayer() function in all versions up to, and including, 1.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources

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