CVE-2026-14334Network attack vector

Stored XSS via SVG upload

Published Aug 19, 2026 · Updated Aug 19, 2026

Stored XSS in Booking calendar, Appointment Booking System 3.2.18 through 3.2.36 allows remote attackers to execute arbitrary JavaScript via a crafted SVG upload. The plugin accepts uploaded SVG files but does not sanitize them completely, so script content can survive the plugin's script-stripping and execute when the stored SVG is opened during booking review. No account is required to submit the payload, and impact depends on a user such as an administrator viewing the stored file; the published records do not describe any server-side code execution path.

CVSS severity8.8
High
EPSS probability0.36%
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 Booking calendar, Appointment Booking System 3.2.18 through 3.2.36 allows remote attackers to execute arbitrary JavaScript via a crafted SVG upload. The plugin accepts uploaded SVG files but does not sanitize them completely, so script content can survive the plugin's script-stripping and execute when the stored SVG is opened during booking review. No account is required to submit the payload, and impact depends on a user such as an administrator viewing the stored file; the published records do not describe any server-side code execution path.

The record

CVE
CVE-2026-14334
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
WpDevArt
Product
Booking Calendar
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=3.2.18 <=3.2.36

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WpDevArt · Booking Calendarversion=3.2.18 <=3.2.36

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

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

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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