CVE-2021-24299Public exploitNetwork attack vector

Browser script execution via unsanitized reservation comments

Published May 17, 2021 · Updated Aug 3, 2024

Stored XSS in Reservation Diary ReDi Restaurant Reservation before 21.0426 allows remote attackers to run script via a booking comment. The public reservation form accepts the Comment field without proper input validation, stores the payload, and renders it in the Upcoming page iframe. No account is required to submit a reservation, but execution requires a plugin user to open the Upcoming view, exposing that user's browser session to attacker-controlled script.

CVSS severity6.1
Medium
EPSS probability5.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Reservation Diary ReDi Restaurant Reservation before 21.0426 allows remote attackers to run script via a booking comment. The public reservation form accepts the Comment field without proper input validation, stores the payload, and renders it in the Upcoming page iframe. No account is required to submit a reservation, but execution requires a plugin user to open the Upcoming view, exposing that user's browser session to attacker-controlled script.

The record

CVE
CVE-2021-24299
Published
May 17, 2021
Updated
Aug 3, 2024
Vendor
Reservation Diary
Product
ReDi Restaurant Reservation
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=21.0426 <21.0426

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Reservation Diary · ReDi Restaurant Reservationversion=21.0426 <21.0426

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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