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CVE-2021-24604

Availability Calendar < 1.2.2 - Authenticated Stored Cross-Site Scripting

MEDIUM
4.8
CVSS Score
Published: September 20, 2021 at 10:06 AM UTC
Updated: June 17, 2026 at 03:40 AM UTC
1 product affected across 1 vendorAvailability Calendar

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.6%

Description

The Availability Calendar WordPress plugin before 1.2.2 does not sanitise or escape its Category Names before outputting them in page/post where the associated shortcode is embed, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed

Affected

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

Availability Calendar· Offshorewebmasterwordpress-plugin
95%
v < 1.2.2
Affected range stops below 1.2.2, 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/d084c5b1-45f1-4e7e-b3e9-3c98ae4bce9c

CVSS

4.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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