My Calendar <= 3.2.17 - Subscriber+ Reflected Cross-Site Scripting

2021-11-01 00:00

Krzysztof Zając

Strategic Overview

Status

Patched in 3.2.18

Affected PluginMy Calendar – Accessible Event Manager

Affected Version<= 3.2.17

CVSS5.4Medium

CVECVE-2021-24927

View all My Calendar – Accessible Event Manager vulnerabilities

Vulnerability Overview

The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue

Technical Analysis

REMEDIATION: Update to version 3.2.18, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2021-24927 https://www.wordfence.com/threat-intel/vulnerabilities/id/cac9614d-3fe5-4657-af6b-81acb71f51f1

CVSS Vector

5.4

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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