PatchSiren cyber security CVE debrief

CVE-2026-67358 j2commerce.com CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-21T20:16:39.450Z and has not been modified since then. This vulnerability affects J2Store versions 1.0.0-3.3.20, 4.0.0-4.0.20, and 4.1.0-4.1.5. An authenticated user with a valid order token could increment the download limit counter on a download record belonging to a different order. The endpoint also lacked a CSRF token, which could allow for potential download quota manipulation. J2Store users, administrators, and security teams should verify affected versions and apply remediation to prevent potential download quota manipulation. They should also review compensating controls for exposed systems while remediation is scheduled and verified.

Vendor: j2commerce.com
Product: J2Store extension for Joomla
CVSS: MEDIUM 5.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-21
Original CVE updated: 2026-08-21
Advisory published: 2026-08-21
Advisory updated: 2026-08-21

Who should care

J2Store users, administrators, and security teams should verify affected versions and apply remediation to prevent potential download quota manipulation. They should also review compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

An authenticated user with a valid order token could increment the download limit counter on a download record belonging to a different order in J2Store versions 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5. The affected endpoint lacked a CSRF token. This vulnerability allows for potential download quota manipulation. To address this, verify affected J2Store versions and apply vendor remediation. Implement compensating controls for download quota manipulation and monitor for suspicious download activity. Review compensating controls for exposed systems while remediation is scheduled and verified.

Defensive priority

Authenticated users with valid order tokens may be able to manipulate download quotas for other orders. Verify affected J2Store versions and apply vendor remediation.

Recommended defensive actions

Verify J2Store versions and apply vendor remediation
Implement compensating controls for download quota manipulation
Monitor for suspicious download activity
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented
Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is limited; verify J2Store versions 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 are in use and apply compensating controls if remediation is pending. The CVE record was published on 2026-08-21T20:16:39.450Z and has not been modified since then. Users should verify affected versions and apply remediation to prevent potential download quota manipulation.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-21T20:16:39.450Z and has not been modified since then.