CVE-2024-8797Network attack vector

Reflected XSS via unescaped update-checker registration URL

Published Sep 14, 2024 · Updated Apr 8, 2026

Reflected XSS in WP Booking System – Booking Calendar 2.0.19.8 and earlier allows remote attackers to execute scripts via a crafted URL. The update-checker registration view emits a URL built with add_query_arg and remove_query_arg without applying URL escaping to attacker-controlled query data. No authentication is required, but a user must follow the crafted link; the script then runs in that user's browser under the site's origin.

CVSS severity6.1
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in WP Booking System – Booking Calendar 2.0.19.8 and earlier allows remote attackers to execute scripts via a crafted URL. The update-checker registration view emits a URL built with add_query_arg and remove_query_arg without applying URL escaping to attacker-controlled query data. No authentication is required, but a user must follow the crafted link; the script then runs in that user's browser under the site's origin.

The record

CVE
CVE-2024-8797
Published
Sep 14, 2024
Updated
Apr 8, 2026
Vendor
Roland Murg
Product
WP Booking System – Booking Calendar
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=2.0.19.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Roland Murg · WP Booking System – Booking Calendarversion=0 <=2.0.19.8

Published CVSS scores

6.1WordfenceCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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