CVE-2026-74252: high-severity vulnerability in j2commerce.com J2Store extension for Joomla
Joomla Extension - j2commerce.com - Stored XSS in Guest checkout in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5
Published
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.6epss 0.5%
from disclosure to weapon1 days
Published on NVDAug 21
1st PoC+1d
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Joomla Extension - j2commerce.com - Stored XSS in Guest checkout in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5 - J2Commerce 4.1.5 is vulnerable to Stored Cross-Site Scripting (XSS) through the guest checkout billing address fields. An unauthenticated attacker exploits a filter bypass in Joomla's Input::getArray() combined with PHP's variables_order=EGPCS (Cookie overrides POST in $_REQUEST ) to store unsanitized HTML in fields such as billing_first_name.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products
j2commerce.com · J2Store extension for Joomlapublic PoCs found — 1
githubgithub.com/toanln-cov/CVE-2026-74252★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — j2commerce.com J2Store extension for Joomla
In the same product, most dangerous first.
CVE-2026-78000MEDIUMJoomla Extension - j2commerce.com - Open redirect in cart controller in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5EPSS 0.5%CVE-2026-67362MEDIUMJoomla Extension - j2commerce.com - Open redirect in cart controller in J2Store 1.0.0-3.3.20, 4.0.0-4.0.20, 4.1.0-4.1.5EPSS 0.5%CVE-2026-81568HIGHJoomla Extension - j2commerce.com - Arbitrary file read via `task=download` in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7EPSS 0.5%CVE-2026-82191MEDIUMJoomla 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, 4.1.0-4.1.7EPSS 0.4%CVE-2026-82189HIGHJoomla Extension - j2commerce.com - Any order can be marked Failed by anyone in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7EPSS 0.4%CVE-2026-77999HIGHJoomla Extension - j2commerce.com - Unauthenticated PayPal callback forgery leading to order confirmation fraud in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6EPSS 0.4%
References
https://www.j2commerce.com/