CVE-2021-24965Public exploitNetwork attack vector

Subscriber-level stored XSS via unsanitized schedule data

Published Jan 24, 2022 · Updated Aug 3, 2024

Stored XSS in Five Star Restaurant Reservations before 2.4.8 allows remote authenticated users to execute script in administrators' browsers. The rtb_welcome_set_schedule AJAX action accepts a crafted schedule_open JSON key without capability or CSRF checks, then stores and renders it without sanitization or escaping. Subscriber access is sufficient, but execution requires a logged-in administrator to open the plugin settings page; the demonstrated impact is script execution in that browser.

CVSS severity5.4
Medium
EPSS probability0.61%
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 Five Star Restaurant Reservations before 2.4.8 allows remote authenticated users to execute script in administrators' browsers. The rtb_welcome_set_schedule AJAX action accepts a crafted schedule_open JSON key without capability or CSRF checks, then stores and renders it without sanitization or escaping. Subscriber access is sufficient, but execution requires a logged-in administrator to open the plugin settings page; the demonstrated impact is script execution in that browser.

The record

CVE
CVE-2021-24965
Published
Jan 24, 2022
Updated
Aug 3, 2024
Vendor
Five Star Plugins
Product
Five Star Restaurant Reservations
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 24, 2022CVE 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

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Is a vulnerable build present?

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

  1. Affected versionversion=2.4.8 <2.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Five Star Plugins · Five Star Restaurant Reservationsversion=2.4.8 <2.4.8

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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