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CVE-2021-24927

My Calendar < 3.2.18 - Subscriber+ Reflected Cross-Site Scripting

MEDIUM
5.4
CVSS Score
Published: November 29, 2021 at 08:25 AM UTC
Updated: June 17, 2026 at 03:41 AM UTC
2 products affected across 2 vendorsMy CalendarMy Calendar

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.6%

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

My Calendar· My Calendar Projectwordpress-plugin
95%
v < 3.2.18
Affected range stops below 3.2.18, so it looks safe — our inference, not a vendor statement
My Calendar· Joedolsonwordpress-plugin
60%
v < 3.2.18
Affected range stops below 3.2.18, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://wpscan.com/vulnerability/86f3acc7-8902-4215-bd75-6105d601524e

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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