Affected versions: < 3.30.0
Full advisory: nvd.nist.gov
CVE-2026-66914CriticalCVSS 9.2
SEBLOD (com_cck) below 3.30.0 - Unauthenticated Path Traversal Arbitrary File Download
SEBLOD versions 1.0.0 to 3.29.0 (the Joomla 3 branch) contain an unauthenticated path traversal flaw (CWE-22). No login, no token and no permissions are required: an attacker can request arbitrary paths and download files from inside AND outside the web root, including configuration.php with your database credentials, and site backups or logs sitting above the document root. CVSS 4.0 base score 9.2 (Critical), reported by Krzysztof Zajac of CERT PL and published by the Joomla CNA on 7 August 2026. Update SEBLOD to 3.30.0 or later. There is no vendor-published workaround; if you cannot update immediately, block com_cck at the WAF for guest traffic and treat the database password, any API keys in configuration.php and any credentials stored in files above the web root as disclosed - rotate them.
Affected versions: < 3.30.0
Official record: cve.org · NVD
Every connected Joomla site is checked against these rules on each audit, and flagged if it runs an affected version.
How CVE-2026-66914 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.
9.2 Critical
CVSS 4.0, scored by Joomla CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:NHow 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:N Integrity
- None. Nothing can be altered
- VA:N Availability
- None. The site stays up
What it does beyond the site
- SC:H Confidentiality
- High. Data on other systems can be read
- SI:N Integrity
- None. Other systems keep their integrity
- SA:N Availability
- None. Other systems stay up
Affected extensions and versions
SEBLOD - SEBLOD (com_cck) 4.0.0 to 4.6.0 - Unauthenticated Path Traversal Arbitrary File Download
SEBLOD versions 4.0.0 to 4.6.0 (the Joomla 4/5 branch) contain an unauthenticated path traversal flaw (CWE-22). No login, no token and no permissions are required: an attacker can request arbitrary paths and download files from inside AND outside the web root, including configuration.php with your database credentials, and site backups or logs sitting above the document root. CVSS 4.0 base score 9.2 (Critical), reported by Krzysztof Zajac of CERT PL and published by the Joomla CNA on 7 August 2026. Update SEBLOD to 4.7.0 or later. There is no vendor-published workaround; if you cannot update immediately, block com_cck at the WAF for guest traffic and treat the database password, any API keys in configuration.php and any credentials stored in files above the web root as disclosed - rotate them.
Affected versions: ≥ 4.0.0 and < 4.7.0
Full advisory: nvd.nist.gov
SEBLOD - SEBLOD (com_cck) 5.0.0 to 6.0.0 - Unauthenticated Path Traversal Arbitrary File Download
SEBLOD versions 5.0.0 to 6.0.0 (the Joomla 6 branch) contain an unauthenticated path traversal flaw (CWE-22). No login, no token and no permissions are required: an attacker can request arbitrary paths and download files from inside AND outside the web root, including configuration.php with your database credentials, and site backups or logs sitting above the document root. CVSS 4.0 base score 9.2 (Critical), reported by Krzysztof Zajac of CERT PL and published by the Joomla CNA on 7 August 2026. Update SEBLOD to 6.0.1 or later. There is no vendor-published workaround; if you cannot update immediately, block com_cck at the WAF for guest traffic and treat the database password, any API keys in configuration.php and any credentials stored in files above the web root as disclosed - rotate them.
Affected versions: ≥ 5.0.0 and < 6.0.1
Full advisory: nvd.nist.gov
Running an affected version on a site you manage?
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Rules current as of 3 October 2026.