Skip to main content
mySites.guru
Free Audit
CriticalPHP2Shell is fixed, but a researcher now claims six more unpatched PHP flaws. Nothing to do today, but PHP is not out of the woodsWhat to prepare
CVE-2026-64876HighCVSS 8.8CVE published 23 July 2026Added to mySites.guru 23 July 2026

Regular Labs GeoIP (geoip) <= 6.3.8 - Zipslip Arbitrary File Write (RCE), CSRF and Privilege Check Bypass, MaxMind Credential Leakage and IP Spoofing

Regular Labs GeoIP up to and including 6.3.8 is affected by four flaws disclosed through the Joomla CNA on 22-23 July 2026. CVE-2026-65431 (CVSS 9.8) is a Zipslip: the GeoIP database update archives are extracted without validating the paths inside them, so a crafted archive can write files anywhere the web user can reach, which is arbitrary file write leading to remote code execution. CVE-2026-64876 (CVSS 8.8) is inconsistent CSRF token and privilege checking across the extension's admin actions. CVE-2026-65430 (CVSS 7.5) leaks the configured MaxMind account credentials. CVE-2026-64875 (CVSS 6.5) allows IP spoofing, so any access rule, geo-restriction or content condition built on GeoIP can be bypassed by an unauthenticated visitor. Update to 7.0.0 or later; the vendor's current release is 7.0.3 (28 July 2026) and it is free. If you cannot update immediately, disable the GeoIP system plugin, and treat any geo-based access control as bypassable until you have.

Is my site affected?

Affected
Regular Labs GeoIP up to and including 6.3.8
Fixed in
Update to 7.0.0 or later
What to do
Update Regular Labs GeoIP to 7.0.0 or later.
Check whether your sites are affected

How CVE-2026-64876 is scored

The base metrics as CISA-ADP 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.

8.8 High

CVSS 3.1, scored by CISA-ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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
PR:N Privileges required
None. No account needed
UI:R User interaction
Required. Someone has to click or visit something
S:U Scope
Unchanged. Contained to the extension it is in

What it does

C:H Confidentiality
High. Everything the site holds can be read
I:H Integrity
High. Data and files can be altered at will
A:H Availability
High. The site can be taken down

The rule below is rated Critical for the set of 4 CVEs it covers together, not for this record on its own.

Timeline

  1. 23 July 2026CVE-2026-64876 record published by its CNA
  2. 23 July 2026mySites.guru check added for Regular Labs GeoIP (up to and including 6.3.8)

Rule details

Other vulnerabilities in Regular Labs GeoIP

Updating for CVE-2026-64876 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

Regular Labs GeoIP

Latest safe version: 7.0.0

References

CVE-2026-64876 questions

Which versions are affected by CVE-2026-64876?
CVE-2026-64876 affects Regular Labs GeoIP up to and including 6.3.8.
How do I fix CVE-2026-64876?
Update Regular Labs GeoIP to 7.0.0 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-64876?
CISA-ADP scores it 8.8 (High) under CVSS 3.1. In plain terms: reachable across the internet, no account needed and someone has to click or visit something.

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 25 October 2026.