CVE-2025-43756
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 · unedited<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}-->A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.3.132, and Liferay DXP 2025.Q1.0 through 2025.Q1.15, 2025.Q2.0 through 2025.Q2.2 and 2024.Q1.13 through 2024.Q1.19 allows a remote authenticated user to inject JavaScript code via snippet parameter.
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 reflected XSS vulnerability exists in Liferay Portal 7.4.3.132 and DXP versions 2025.Q1.0-2025.Q1.15, 2025.Q2.0-2025.Q2.2, and 2024.Q1.13-2024.Q1.19, allowing authenticated users to inject arbitrary JavaScript via a 'snippet' parameter in a web request.
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>= 2024.q1.1, < 2024.q1.20>= 2025.Q1.0, < 2025.Q1.16>= 2025.Q2.0, < 2025.Q2.3= 7.4.3.132CVSS 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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Identify Liferat DXP or Portal versionCheck the product version through the Liferat Control Panel (Control Panel > Configuration > System Information) or by inspecting the portal-ext.properties file, or running the command: curl -s http://<host>/c/portal/json_service or checking the WAR file version metadataAffected if Version is 7.4.3.132, or falls within 2024.Q1.13-2024.Q1.19, 2025.Q1.0-2025.Q1.15, or 2025.Q2.0-2025.Q2.2
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Confirm authenticated user access existsVerify that user accounts with access to the affected functionality exist in the Liferat instance. Check via Control Panel > Users and Personal Sites, or review database tables for user entries (typically User_ table in the Liferat database)Affected if There is at least one authenticated user account in the system who can access the vulnerable endpoint
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Identify if the vulnerable snippet parameter feature is exposedLocate web forms or API endpoints that accept a 'snippet' parameter. This typically involves reviewing custom portlets, web content templates, or fragment modules. Search codebase or deployed modules for parameter name 'snippet' in form handlers or controller logicAffected if The Liferat instance exposes any web endpoint, portlet, or API that accepts a 'snippet' parameter without proper output encoding
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Test for reflected XSS in snippet parameterIf an endpoint accepting 'snippet' is found, send a request with a benign XSS payload such as <script>alert(1)</script> and verify if it reflects unencoded in the response. Example: curl 'http://<host>/web/guest/page?snippet=<script>alert(1)</script>'Affected if The payload reflects directly in the HTTP response without HTML encoding
You are affected if your Liferat DXP or Portal version falls within the affected ranges AND you have authenticated users who can access an endpoint that processes the snippet parameter, as the vulnerability requires both conditions to be exploitable.
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.
dbcve · scoped2024.q1.202025.Q1.162025.Q2.3
Implement proper input validation and output encoding for the snippet parameter, or deploy a Web Application Firewall (WAF) rule to filter malicious script payloads until the vendor patch is applied.
2024.Q1.20 (for 2024.Q1 branch) | 2025.Q1.16 (for 2025.Q1 branch) | 2025.Q2.3 (for 2025.Q2 branch) | 7.4.3.133+ (for Portal 7.4.3.x)
- Identify your current Liferay installation version from the Liferell Control Panel or version file
- For DXP 2024.Q1.x: Upgrade to version 2024.Q1.20 or later
- For DXP 2025.Q1.x: Upgrade to version 2025.Q1.16 or later
- For DXP 2025.Q2.x: Upgrade to version 2025.Q2.3 or later
- For Liferell Portal 7.4.3.132: Upgrade to 7.4.3.133 or later (next subsequent patch release)
- After upgrade, verify the snippet parameter is properly sanitized by testing with a benign script payload
- Ensure all authenticated users are aware of the security update
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43756 — 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-2025-43756 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
- No spam, self-promotion, credentials, or personal data