CVE-2026-0868Network attack vector

Stored XSS via unescaped calendly shortcode attributes

Published Apr 19, 2026 · Updated Apr 19, 2026

Stored cross-site scripting in Simpma EMC Scheduling Manager 4.4 and earlier allows remote authenticated users to inject browser scripts. The calendly shortcode renderer places user-controlled attributes into generated embed markup without sufficient sanitization or context-appropriate output escaping. Contributor-level WordPress access is required; the stored script executes when a visitor loads the affected page, enabling page-context data access and content changes.

CVSS severity6.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in Simpma EMC Scheduling Manager 4.4 and earlier allows remote authenticated users to inject browser scripts. The calendly shortcode renderer places user-controlled attributes into generated embed markup without sufficient sanitization or context-appropriate output escaping. Contributor-level WordPress access is required; the stored script executes when a visitor loads the affected page, enabling page-context data access and content changes.

The record

CVE
CVE-2026-0868
Published
Apr 19, 2026
Updated
Apr 19, 2026
Vendor
Simpma
Product
EMC Scheduling Manager
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Simpma · EMC Scheduling Managerversion=0 <=4.4

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo