CVE-2021-25061Public exploitNetwork attack vector

Authenticated script execution via unescaped search parameter

Published Jan 17, 2022 · Updated Aug 3, 2024

Reflected XSS in WP Booking System – Booking Calendar before 2.0.15 allows remote authenticated users to execute script via admin search. The wpbs-calendars and wpbs-forms admin views place the unescaped s query parameter into an HTML attribute, so crafted markup becomes executable script. Exploitation requires authentication and a victim to open the crafted URL; script then runs in the victim's browser within that session's page context.

CVSS severity5.4
Medium
EPSS probability0.68%
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 before 2.0.15 allows remote authenticated users to execute script via admin search. The wpbs-calendars and wpbs-forms admin views place the unescaped s query parameter into an HTML attribute, so crafted markup becomes executable script. Exploitation requires authentication and a victim to open the crafted URL; script then runs in the victim's browser within that session's page context.

The record

CVE
CVE-2021-25061
Published
Jan 17, 2022
Updated
Aug 3, 2024
Vendor
Roland Murg
Product
WP Booking System – Booking Calendar
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 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

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=2.0.15 <2.0.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Roland Murg · WP Booking System – Booking Calendarversion=2.0.15 <2.0.15

Published CVSS scores

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

Weakness, pattern, technique

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

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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