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TI-2026-56678 Aliases CVE-2026-82191GHSA-hv62-7458-mg3v

Joomla Extension - j2commerce.com - Unescaped request data reflected into PayPal notify…

Priority LOW 24CWE-1241Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Joomla Extension - j2commerce.com - Unescaped request data reflected into PayPal notify redirect in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7 - A crafted link to the paypal notify endpoint, if followed by a victim's browser (or an automated system that fetches it), causes the resulting redirect to `com_j2store`'s checkout controller to carry attacker-chosen query parameters instead of only the intended `view=checkout&task=confirmPayment&orderpayment_type=...&paction=process` set — parameter injection/smuggling into that follow-up request. This requires a victim to load the crafted link (`UI:R`/`UI:P`); it does not by itself grant an unauthenticated attacker anything they could not already obtain by requesting the target `com_j2store` URL directly with their own parameters.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00447 39th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
j2commerce.comJ2Store extension for Joomla1.0.0-3.3.22; 4.0.0-4.0.22; 4.1.0-4.1.7—No fix listedCNA
  • J2Store extension for Joomla Vendorj2commerce.com Affected 1.0.0-3.3.22; 4.0.0-4.0.22; 4.1.0-4.1.7 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82191
  2. 2026-10-03 Alias added: GHSA-hv62-7458-mg3v

References

Other 1

  • TI-2026-56676 Joomla Extension - j2commerce.com - Any order can be marked Failed by anyone in J2Store… CVSS 4.0HIGH 8.7
  • TI-2026-56276 Path traversal in j2commerce.com J2Store extension for Joomla CVSS 4.0HIGH 8.7
  • TI-2026-56275 SQL injection in j2commerce.com J2Store extension for Joomla CVSS 4.0HIGH 8.7
  • TI-2026-54302 Authorization bypass in j2commerce.com J2Store extension for Joomla CVSS 4.0HIGH 8.8
  • TI-2026-54274 Joomla Extension - j2commerce.com - Unauthenticated PayPal callback forgery leading to… CVSS 4.0HIGH 8.7
  • TI-2026-47655 Authorization bypass in j2commerce.com J2Store extension for Joomla CVSS 4.0HIGH 8.7
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences