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CVE-2025-40636CriticalCVSS 9.3CVE published 3 October 2025Added to mySites.guru 3 October 2025

Visitors Counter (mod_vvisit_counter) <= 2.0.4 - Unauthenticated SQL Injection

The Vinaora Visitors Counter module, version 2.0.4j3 and earlier, contains a SQL injection reachable through the cip_vvisitcounter cookie on every endpoint where the module counts a visit. No authentication is required. CVSS 9.3 (Critical). The module reports its version as plain "2.0.4" in the Joomla manifest, so the ceiling here is 2.0.4 inclusive. Update to 3.4.0 or later, or remove the module - the extension is no longer actively maintained.

Is my site affected?

Affected
Visitors Counter up to and including 2.0.4
Fixed in
Update to 3.4.0 or later
What to do
Update Visitors Counter to 3.4.0 or later.
Check whether your sites are affected

How CVE-2025-40636 is scored

The base metrics as INCIBE 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.

9.3 Critical

CVSS 4.0, scored by INCIBE CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:N Privileges required
None. No account needed
UI:N User interaction
None. Nobody has to be tricked into anything

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:H Availability
High. The site can be taken down

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. 3 October 2025CVE-2025-40636 record published by its CNA
  2. 3 October 2025mySites.guru check added for Visitors Counter (up to and including 2.0.4)

Rule details

Other vulnerabilities in Visitors Counter

Updating for CVE-2025-40636 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

Visitors Counter

Latest safe version: 3.4.0

References

CVE-2025-40636 questions

Which versions are affected by CVE-2025-40636?
CVE-2025-40636 affects Visitors Counter up to and including 2.0.4.
How do I fix CVE-2025-40636?
Update Visitors Counter to 3.4.0 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2025-40636?
INCIBE CNA scores it 9.3 (Critical) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and nobody has to be tricked into anything.

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 5 October 2026.