# Regular Labs GeoIP (geoip) <= 6.3.8 - Zipslip Arbitrary File Write (RCE), CSRF and Privilege Check Bypass, MaxMind Credential Leakage and IP Spoofing [Joomla Vulnerability Database](https://mysites.guru/vulnerabilities/)/CVE-2026-64876 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. Copy citation ## 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](https://mysites.guru/free-audit/) ## 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 Critical[CVE-2026-65431](https://mysites.guru/vulnerabilities/CVE-2026-65431/)[CVE-2026-64876](https://mysites.guru/vulnerabilities/CVE-2026-64876/)[CVE-2026-65430](https://mysites.guru/vulnerabilities/CVE-2026-65430/)[CVE-2026-64875](https://mysites.guru/vulnerabilities/CVE-2026-64875/)2026-07-23 Regular Labs GeoIP Affected versions: ≤ 6.3.8 Full advisory: [regularlabs.com](https://regularlabs.com/geoip) ## 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 - [CVE-2026-65431](https://mysites.guru/vulnerabilities/CVE-2026-65431/) Critical, up to and including 6.3.8 - [CVE-2026-65430](https://mysites.guru/vulnerabilities/CVE-2026-65430/) Critical, up to and including 6.3.8 - [CVE-2026-64875](https://mysites.guru/vulnerabilities/CVE-2026-64875/) Critical, up to and including 6.3.8 ## References - [CVE-2026-64876 on cve.org (the official CVE record)](https://www.cve.org/CVERecord?id=CVE-2026-64876) - [CVE-2026-64876 in the NIST National Vulnerability Database](https://nvd.nist.gov/vuln/detail/CVE-2026-64876) - [regularlabs.com/geoip](https://regularlabs.com/geoip) ## CVE-2026-64876 questions Show all Which versions are affected by CVE-2026-64876? [CVE-2026-64876](https://mysites.guru/vulnerabilities/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](https://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](https://mysites.guru/joomla-vulnerability-scanner/), which reads every installed extension's version on each audit. Browse the rest of the [Joomla vulnerability database](https://mysites.guru/vulnerabilities/). Rules current as of 14 October 2026.