CVE-2026-75948Network attack vector

Stored XSS via unescaped attachment fields

Published Aug 20, 2026 · Updated Aug 21, 2026

Stored XSS in JoomliC iCagenda 4.0.8 through 4.0.12 allows remote authenticated users to run script via crafted attachment fields. The frontend Submit an Event form stores the image and file fields as raw strings and later emits them into HTML attributes without output escaping. Exploitation requires the ability to submit an event, which is registered-only by default but can be exposed more broadly if administrators publish the form with public access; resulting script runs in the viewer's browser session and can steal data or perform actions available to that session.

CVSS severity8.6
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in JoomliC iCagenda 4.0.8 through 4.0.12 allows remote authenticated users to run script via crafted attachment fields. The frontend Submit an Event form stores the image and file fields as raw strings and later emits them into HTML attributes without output escaping. Exploitation requires the ability to submit an event, which is registered-only by default but can be exposed more broadly if administrators publish the form with public access; resulting script runs in the viewer's browser session and can steal data or perform actions available to that session.

The record

CVE
CVE-2026-75948
Published
Aug 20, 2026
Updated
Aug 21, 2026
Vendor
JoomliC
Product
iCagenda
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.0.8-4.0.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JoomliC · iCagendaversion=4.0.8-4.0.12

Published CVSS scores

8.6JoomlaCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1059.007Command and Scripting Interpreter: JavaScript

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

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Your stack

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