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CVE-2026-56290

Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c487a594e4ae3301a27900b05dee6ca2c118ae8537c703125d5e4b45648dd06c
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"JoomlaCK.fr Page Builder CK extension for Joomla","vendor":"joomlack.fr","versions":[{"status":"affected","version":"1.0-3.6.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"YES","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":10,"baseSeverity":"CRITICAL","exploitMaturity":"ATTACKED","privilegesRequired":"NONE","providerUrgency":"RED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"H…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-284"],"dateAdded":"2026-07-07","dueDate":"2026-07-10","knownRansomwareCampaignUse":"Unknown","notes":"https://www.joomlack.fr/en/joomla-extensions/page-builder-ck ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56290","product":"Page Builder","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring co…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:9fd66910d7fba5f53b99e3c730519ff39a0a2efc10e7d29c0b53f990281e11f4 · sha256:635dff916c4092c0… · /vulnerabilities/27
    Open source location →
{"cwes":["CWE-284"],"dateAdded":"2026-07-07","dueDate":"2026-07-10","knownRansomwareCampaignUse":"Unknown","notes":"https://www.joomlack.fr/en/joomla-extensions/page-builder-ck ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56290","product":"Page Builder","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring co…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:3e81da01344d92b0b9160a1853c2b0efc020c2fb281e06ea60a7980b8a60b2a9 · sha256:16acee8334e59e44… · /vulnerabilities/24
    Open source location →

Source references

4 source assertions
{"tags":["patch"],"url":"https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/adp/0/references/1
{"tags":["third-party-advisory"],"url":"https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/adp/0/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/adp/0/references/2
{"tags":["product"],"url":"https://www.joomlack.fr/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ff219e68e25c3b5f52baf22cfc70ba23131424febfe83752e37dd8636d7c820 · sha256:002b3515eb77763c… · /containers/cna/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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