CVE-2023-40560 MEDIUM

CVE-2023-40560: WordPress Schedule Posts Calendar Plugin <= 5.2 is vulnerable to Cross Site Scripting (XSS)

Vendor Greg Ross
Product Schedule Posts Calendar
Weakness CWE-79 · XSS
Published September 6, 2023
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Greg Ross Schedule Posts Calendar plugin <= 5.2 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Schedule Posts Calendar versions up to 5.2 contain a stored cross-site scripting vulnerability. An authenticated user with high privileges can inject malicious scripts into the calendar that execute when other users view the affected page. The vulnerability requires user interaction to trigger and can affect the confidentiality, integrity, and availability of the site.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they view the calendar.

Potential impact on your site

04Site Impact

Malicious admins or editors can inject scripts affecting site visitors' data, sessions, or site functionality.

Conditions required to exploit

05Prerequisites

Attacker must have high-level admin or editor privileges and the victim must visit the affected calendar page.

Key dates

06Disclosure timeline

September 6, 2023 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

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