TYPO3CMS
CVE-2020-11065
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 · uneditedIn TYPO3 CMS greater than or equal to 9.5.12 and less than 9.5.17, and greater than or equal to 10.2.0 and less than 10.4.2, it has been discovered that link tags generated by typolink functionality are vulnerable to cross-site scripting; properties being assigned as HTML attributes have not been parsed correctly. This has been fixed in 9.5.17 and 10.4.2.
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 confidenceCross-site scripting (XSS) vulnerability in TYPO3 CMS typolink functionality where HTML attributes in generated link tags are not properly parsed, allowing injection of malicious scripts through improperly handled link properties.
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
TYPO3CMS
>= 9.5.12, < 9.5.17>= 10.2.0, < 10.4.2CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/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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Determine TYPO3 CMS versionCheck the installed TYPO3 version via the Admin Dashboard (Help > About TYPO3), the Install Tool (typo3/install.php), or by inspecting the file typo3/sysext/core/Classes/Information/Typo3Version.php for the version constantAffected if Installed version is 9.5.12 through 9.5.16, or 10.2.0 through 10.4.1
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Verify typolink functionality is in useSearch the codebase for usages of the typolink method, typically in fluid templates using f:link.typolink view helper, or in TypoScript using the typolink propertyAffected if Typolink is used to generate links from any user-provided or external data (such as link text, title, or link parameters)
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Inspect generated link HTML outputView the HTML source of pages containing typolink-generated links and examine the anchor tags for any link properties that may derive from user input, such as link text, title attribute, or additional parametersAffected if User-supplied values appear unsanitized in href, title, class, or other HTML attributes within the generated anchor tags
Your environment is affected if TYPO3 CMS version falls within 9.5.12-9.5.16 or 10.2.0-10.4.1 AND the typolink feature processes untrusted input for link attributes.
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 data9.5.1710.4.2
Upgrade TYPO3 CMS to version 9.5.17 or 10.4.2 or later to patch the XSS vulnerability in typolink-generated link tags.
Fix this in TYPO3
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-11065 — 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-2020-11065 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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- 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
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