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CVE-2026-75948HighCVSS 8.6CVE published 20 August 2026Added to mySites.guru 20 August 2026

iCagenda (com_icagenda) 4.0.8 to 4.0.12 - Authenticated Stored XSS via Submit an Event

iCagenda 4.0.8 to 4.0.12 store the image and file fields of the front-end Submit an Event form as raw strings and print them into HTML attributes without escaping, so a logged-in user allowed to submit events can store JavaScript that runs in the browser of anyone who views the event, administrators included. CVE-2026-75948, CVSS 4.0 8.6 High, published by the Joomla CNA on 20 August 2026. The flaw was introduced in 4.0.8 and fixed in 4.0.13. Update iCagenda to the current release (4.0.17 or later also closes the later stored XSS and CSV injection CVEs). Until then, restrict the Submit an Event menu item to trusted user groups and review submitted events for unexpected markup.

Is my site affected?

Affected
iCagenda from 4.0.8 up to but not including 4.0.13
Fixed in
4.0.13
What to do
Update iCagenda to 4.0.13 for this flaw, or to 4.0.17 or later, which no rule we check matches.
Check whether your sites are affected

How CVE-2026-75948 is scored

The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.

8.6 High

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:L Attack complexity
Low. Nothing to work around, it just works
AT:N Attack requirements
None. Works against any affected install
PR:L Privileges required
Low. Any logged-in account will do
UI:P User interaction
Passive. Someone has to visit a page

What it does to the site

VC:H Confidentiality
High. Everything the site holds can be read
VI:H Integrity
High. Data and files can be altered at will
VA:L Availability
Low. The site slows or stutters

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:N Integrity
None. Other systems keep their integrity
SA:N Availability
None. Other systems stay up

Timeline

  1. 20 August 2026CVE-2026-75948 record published by its CNA
  2. 20 August 2026mySites.guru check added for iCagenda (from 4.0.8 up to but not including 4.0.13)

Rule details

Other vulnerabilities in iCagenda

Updating for CVE-2026-75948 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

iCagenda

Latest safe version: 4.0.17

References

CVE-2026-75948 questions

Which versions are affected by CVE-2026-75948?
CVE-2026-75948 affects iCagenda from 4.0.8 up to but not including 4.0.13. The fix is in 4.0.13.
How do I fix CVE-2026-75948?
Update iCagenda to 4.0.13 for this flaw, or to 4.0.17 or later, which no rule we check matches. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-75948?
Joomla CNA scores it 8.6 (High) under CVSS 4.0. In plain terms: reachable across the internet, any logged-in account will do and someone has to visit a page.

Running an affected version on a site you manage?

A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.

This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

Rules current as of 11 November 2026.