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CVE-2026-75956HighCVSS 8.7CVE published 19 August 2026Added to mySites.guru 19 August 2026

J-BusinessDirectory (com_jbusinessdirectory) 4.9.8 to 6.2.2 - Unauthenticated Arbitrary File Upload and Path Traversal (RCE, CVSS 10.0), Unauthenticated SQL Injection and Seven Further Issues

CMSJunkie released J-BusinessDirectory 6.2.3 on 31 July 2026 to fix eight security issues found during their own security review. The technical detail was withheld at the time and was published as CVEs on 19 August 2026, all of them stated as affecting 1.0.0 to 6.2.2. The most serious, CVE-2026-75949 (CVSS 10.0), is an unauthenticated arbitrary file upload and deletion: the upload and remove handlers accepted a client-controlled path root (_path_type could be pointed at the component site or admin trees), enforced no path containment, used a weak file extension check, and carried no CSRF token, which gives an anonymous attacker remote code execution and arbitrary file deletion. CVE-2026-75954 (CVSS 9.3) is an unauthenticated SQL injection in the trips search, where the search keywords and the ORDER BY clause were concatenated into the query. CVE-2026-75956 (CVSS 8.7) is a denial of service through untyped pagination parameters, where an array such as limitstart[] triggers PHP type errors and limit was never validated. CVE-2026-75950 and CVE-2026-75951 (both CVSS 6.9) are an unauthenticated listing ownership takeover using attacker-supplied company and user IDs, including for listings that already had an owner, and insecure direct object references across multiple front-end and API actions. CVE-2026-75955 (CVSS 5.1) is a reflected XSS and XML injection via an unescaped companyName written into an XML attribute. CVE-2026-75952 (CVSS 4.6) is missing CSRF tokens on many state-changing tasks: contact and quote forms, cart, bookmarks, uploads, messages, AI text generation, and several administrator actions. CVE-2026-75953 is an open mail relay, taking the recipient address from the request (contact_id_offer / contact_id_event) rather than the stored offer or event record. Also inside this range is CVE-2020-5182, reverse tabnabbing on the user-supplied business website link, fixed in 5.2.9. Update to 6.2.5 or later rather than stopping at 6.2.3: CMSJunkie shipped two further security releases (6.2.4 on 7 August and 6.2.5 on 14 August 2026), so 6.2.3 and 6.2.4 are still flagged. The JBD Apps add-ons must be updated to their own latest versions as well. Until you can update, treat the site as exposed to unauthenticated remote code execution: restrict front-end access to the directory and review the site for unexpected users, listings and PHP files under the component media and upload folders.

Is my site affected?

Affected
J-BusinessDirectory after 4.9.7 up to but not including 6.2.3
Fixed in
6.2.3
What to do
Update J-BusinessDirectory to 6.2.3 for this flaw, or to 6.2.5 or later, which no rule we check matches.
Check whether your sites are affected

How CVE-2026-75956 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.

8.7 High

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:N

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
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:N Confidentiality
None. Nothing can be read
VI:N Integrity
None. Nothing can be altered
VA:H Availability
High. The site can be taken down

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:L Integrity
Low. Some data on other systems can be altered
SA:N Availability
None. Other systems stay up

The rule below is rated Critical for the set of 9 CVEs it covers together, not for this record on its own.

Timeline

  1. 19 August 2026CVE-2026-75956 record published by its CNA
  2. 19 August 2026mySites.guru check added for J-BusinessDirectory (after 4.9.7 up to but not including 6.2.3)

Rule details

Other vulnerabilities in J-BusinessDirectory

Updating for CVE-2026-75956 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

J-BusinessDirectory

Latest safe version: 6.2.5

All 10 CVEs in J-BusinessDirectory

References

CVE-2026-75956 questions

Which versions are affected by CVE-2026-75956?
CVE-2026-75956 affects J-BusinessDirectory after 4.9.7 up to but not including 6.2.3. The fix is in 6.2.3.
How do I fix CVE-2026-75956?
Update J-BusinessDirectory to 6.2.3 for this flaw, or to 6.2.5 or later, which no rule we check matches. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-75956?
Joomla CNA scores it 8.7 (High) 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?

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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 5 October 2026.