CVE-2023-0096: Happyforms < 1.22.0 - Contributor+ Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-02-06 · updated 2026-06-17

Description

The Happyforms WordPress plugin before 1.22.0 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Affected products

Happyforms: before 1.22.0 — fixed in 1.22.0

How to fix

Upgrade to a fixed version: Happyforms 1.22.0. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/b28150e7-214b-4bcd-85c0-e819c4223484
https://wpscan.com/vulnerability/b28150e7-214b-4bcd-85c0-e819c4223484

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