CVE-2024-8663Network attack vector

Script execution via unescaped generated URLs

Published Sep 13, 2024 · Updated Apr 8, 2026

Reflected XSS in WP Simple Booking Calendar 2.0.10 and earlier allows remote attackers to execute scripts via a crafted link. Two admin views build URLs with add_query_arg() and remove_query_arg() and print them without output escaping. Exploitation requires no account but requires a user to follow the attacker-supplied URL; the script then runs in that user's browser under the site's origin.

CVSS severity6.1
Medium
EPSS probability0.44%
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 Simple Booking Calendar 2.0.10 and earlier allows remote attackers to execute scripts via a crafted link. Two admin views build URLs with add_query_arg() and remove_query_arg() and print them without output escaping. Exploitation requires no account but requires a user to follow the attacker-supplied URL; the script then runs in that user's browser under the site's origin.

The record

CVE
CVE-2024-8663
Published
Sep 13, 2024
Updated
Apr 8, 2026
Vendor
Roland Murg
Product
WP Simple Booking Calendar
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 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 <=2.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Roland Murg · WP Simple Booking Calendarversion=0 <=2.0.10

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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