CVE-2021-20744
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedCross-site scripting vulnerability in EC-CUBE Category contents plugin (for EC-CUBE 3.0 series) versions prior to version 1.0.1 allows a remote attacker to inject an arbitrary script by leading an administrator or a user to a specially crafted page and to perform a specific operation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA stored cross-site scripting (XSS) vulnerability in the EC-CUBE Category contents plugin for version 3.0 series allows remote attackers to inject arbitrary JavaScript code through a specially crafted page. The vulnerability exists in versions prior to 1.0.1 and requires user interaction (admin or regular user) to trigger the malicious payload.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.0.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify if EC-CUBE is runningCheck for EC-CUBE installation by looking for its characteristic file structure or accessing the admin panel. Common paths include /html/ or /src/ directories with EC-CUBE framework files.Affected if EC-CUBE is present in the environment
-
Check if Category contents plugin is installedAccess the EC-CUBE admin panel and navigate to the plugin management section (typically found under 'システム設定' > 'プラグイン' or 'Plugins'). Look for 'Category contents' or 'カテゴリcontents' in the installed plugins list.Affected if The Category contents plugin appears in the installed plugins list
-
Verify the plugin versionIn the plugin management section, click on the Category contents plugin details to view its version number. Compare this version against 1.0.1.Affected if The displayed version is lower than 1.0.1 or the version field is blank/unavailable
-
Confirm the plugin is enabledIn the same plugin management section, verify that the Category contents plugin status shows as '有効' (enabled) or 'Active'. Check if there are any content pages or category-related features accessible to users.Affected if The plugin is enabled and functional, allowing content management through category pages
If EC-CUBE with the Category contents plugin version below 1.0.1 is installed and enabled, the environment is affected by this stored XSS vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data1.0.1
Upgrade to version 1.0.1 or later of the EC-CUBE Category contents plugin, which contains the XSS fix. If immediate upgrade is not possible, implement proper output encoding and input validation on all user-supplied data within the plugin.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20744 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-20744 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data