Regular Labs GeoIP
Affected versions: ≤ 6.3.8
Full advisory: regularlabs.com
CVE-2026-64876HighCVSS 8.8Published 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.
Affected versions: ≤ 6.3.8
Official record: cve.org · NVD
Every connected Joomla site is checked against this rule on each audit, and flagged if it runs an affected version.
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-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HHow 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.
Affected extensions and versions
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Rules current as of 3 October 2026.