CVE-2021-24299: ReDi Restaurant Reservations < 21.0426 - Unauthenticated Stored Cross-Site Scripting (XSS)

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-17 · updated 2026-06-17
Weakness: CWE-79

Description

The ReDi Restaurant Reservation WordPress plugin before 21.0426 provides the functionality to let users make restaurant reservations. These reservations are stored and can be listed on an 'Upcoming' page provided by the plugin. An unauthenticated user can fill in the form to make a restaurant reservation. The form to make a restaurant reservation field called 'Comment' does not use proper input validation and can be used to store XSS payloads. The XSS payloads will be executed when the plugin user goes to the 'Upcoming' page, which is an external website https://upcoming.reservationdiary.eu/ loaded in an iframe, and the stored reservation with XSS payload is loaded.

Affected products

Catzsoft Redi Restaurant Reservation: before 21.0426 — fixed in 21.0426

How to fix

Upgrade to a fixed version: Catzsoft Redi Restaurant Reservation 21.0426. Check the vendor advisory for mitigations.

References

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