Affected versions: < 3.30.0
Full advisory: nvd.nist.gov
CVE-2026-66914CriticalCVSS 9.2CVE published 7 August 2026
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.
Is my site affected?
CVE-2026-66914 is checked by 3 rules. Find the extension and release line your site runs:
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
Timeline
- 7 August 2026CVE-2026-66914 record published by its CNA
Rule details
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
Other vulnerabilities in SEBLOD
Updating for CVE-2026-66914 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.
SEBLOD
Latest safe version: 6.0.1
References
- CVE-2026-66914 on cve.org (the official CVE record)
- CVE-2026-66914 in the NIST National Vulnerability Database
CVE-2026-66914 questions
Which versions are affected by CVE-2026-66914?
CVE-2026-66914 is covered by 3 rules: SEBLOD before 3.30.0; SEBLOD from 4.0.0 up to but not including 4.7.0; SEBLOD from 5.0.0 up to but not including 6.0.1.
How do I fix CVE-2026-66914?
It depends on the extension and release line your site runs. For SEBLOD before 3.30.0: update SEBLOD to 3.30.0 or later. For SEBLOD from 4.0.0 up to but not including 4.7.0: update SEBLOD to 4.7.0 or later. For SEBLOD from 5.0.0 up to but not including 6.0.1: update SEBLOD to 6.0.1 or later.
How severe is CVE-2026-66914?
Joomla CNA scores it 9.2 (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 24 October 2026.