What is CVE-2021-24299?

CVE-2021-24299 is a medium-severity vulnerability in Catzsoft Redi Restaurant Reservation, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-17.

How severe is CVE-2021-24299?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-24299 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Catzsoft Redi Restaurant Reservation

CVE-2021-24299

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-05-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.055 (92.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.055 · newest: 0.055 · change: 0.000

Affected products

Catzsoft Redi Restaurant Reservation
Reservation Diary Redi Restaurant — versions 21.0426

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

wpscan.com/vulnerability/fd6ce00b-8c5f-4180-b648-f47b37303670 (Exploit, Third Party Advisory)
packetstormsecurity.com/files/162756/WordPress-ReDi-Restaurant-Reservation-21.0… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-24299?: CVE-2021-24299 is a medium-severity vulnerability in Catzsoft Redi Restaurant Reservation, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-05-17.
How severe is CVE-2021-24299?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-24299 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.