Joomla Extension - j2commerce.com - Unescaped request data reflected into PayPal notify redirect...
Summary
Vulnerability reported (CVE-2026-82191). Risk of unauthorized operations or information disclosure. Exploitable via com_j2store.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-82191 has been found.
Attackers can target a specific entry point like com_j2store over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-82191" on the vendor's site.
CVE-2026-82191 — CWE-1241
Attack surface: com_j2store
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-1241) has been reported. Attackers reach the vulnerable code path via com_j2store.
Check the vendor advisory for the affected versions. Attack surface: com_j2store.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで影響コンポーネントを特定する。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web security@joomla.org
- web nvd.nist.gov
- web j2commerce.com
- web github.com