CVE-2020-9581
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 · uneditedMagento versions 2.3.4 and earlier, 2.2.11 and earlier (see note), 1.14.4.4 and earlier, and 1.9.4.4 and earlier have a stored cross-site scripting vulnerability. Successful exploitation could lead to sensitive information disclosure.
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 Magento allows authenticated attackers to inject malicious JavaScript into application fields that are persisted on the server. When other users view the affected content, the malicious script executes in their browsers, potentially enabling session hijacking, credential theft, or sensitive information disclosure.
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<= 1.9.4.4<= 1.14.4.4>= 2.2.0, <= 2.2.11>= 2.3.0, <= 2.3.4CVSS 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.
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Identify installed Magento versionLocate the version file in your Magento installation: for M1 check app/etc/config.xml or composer.json; for M2 check composer.json or bin/magento --versionAffected if The version number is <= 1.9.4.4, <= 1.14.4.4, between 2.2.0-2.2.11, or between 2.3.0-2.3.4
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Confirm user input persistence existsIdentify which application fields accept and store user-submitted data server-side (such as product descriptions, customer notes, CMS content, or category names)Affected if The application stores user-supplied input in database fields that are later rendered in the frontend without proper output encoding
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Examine stored content for injected scriptsQuery the database for common XSS payloads in text fields: search for patterns like <script>, javascript:, onerror=, onload=, and img src=x onerror= in tables that hold user-editable content such as catalog_product_entity_text, cms_page, or customer_entity_varcharAffected if Records containing suspicious HTML or JavaScript fragments are found in fields that are displayed to other users
You are affected if your Magento version falls within the affected ranges AND user-supplied content is stored and rendered without sanitization, particularly if malicious scripts are already present in your database.
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 dataApply the official Magento security patch or upgrade to a patched version (Magento 2.3.5+, 2.2.12+, 1.14.4.5+, or 1.9.4.5+). Review the application for any existing injected payloads that may have been planted prior to patching.
- Consultation3.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9581 — 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-2020-9581 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
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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