CVE-2026-59516

HIGH

WordPress ICS Calendar plugin <= 12.1.1 - Cross Site Scripting (XSS) vulnerability

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-59516. PoCs published by incogbyte.

AI-analyzed exploit summary Unauthenticated reflected XSS in ICS Calendar WordPress plugin <= 12.1.1 via arbitrary HTML attribute injection in the 'r34ics-print' query parameter. The exploit leverages unsanitized attribute names to inject executable event handlers like 'onmouseover'.

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Room 34 Creative Services, LLC ICS Calendar ics-calendar allows Reflected XSS.This issue affects ICS Calendar: from n/a through <= 12.1.1.

Exploits (1)

github WORKING POC 3 stars
by incogbyte · pythonpoc
https://github.com/incogbyte/wp-cve-exploits/tree/main/CVE-2026-59516

Unauthenticated reflected XSS in ICS Calendar WordPress plugin <= 12.1.1 via arbitrary HTML attribute injection in the 'r34ics-print' query parameter. The exploit leverages unsanitized attribute names to inject executable event handlers like 'onmouseover'.

Classification
Working Poc 99%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: ICS Calendar WordPress plugin <= 12.1.1
No auth needed
Prerequisites: Target must be running ICS Calendar plugin version <= 12.1.1 · Attacker must craft a malicious GET request to a front-end WordPress page
mistral-large-3 · analyzed Jul 14, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 7.1
EPSS 0.0014
EPSS Percentile 3.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
Room 34 Creative Services, LLC/ICS Calendar < 12.1.1
Published Jul 13, 2026
Tracked Since Jul 13, 2026