dbcve.org
Router ManagerOperating system · Synology

CVE-2024-53283

MEDIUM · 5.9 CVSS v3.1 Published 2024-12-09
Fix available
A fix is available. Upgrade to 1.3.1-9346 or later.
See remediation →
63/100
Remediation priority · Elevated
Remotely reachable

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
Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Router Port Forward functionality in Synology Router Manager (SRM) before 1.3.1-9346-10 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information and conduct limited denial-of-service attacks by injecting arbitrary web script or HTML.

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 confidence

Cross-site Scripting (XSS) vulnerability in the Router Port Forward functionality of Synology Router Manager (SRM) allows authenticated administrators to inject arbitrary web script or HTML into port forward configuration entries. This stored XSS executes when other administrators or the web interface renders the affected configuration pages, potentially enabling limited file access and denial-of-service attacks.

MitigationUpgrade Synology Router Manager to version 1.3.1-9346-10 or later to patch this vulnerability. As a defensive measure, limit administrative access to trusted personnel and monitor for suspicious port forward configurations.

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
Router ManagerOperating system
Affected:>= 1.3, < 1.3.1-9346= 1.3.1-9346

CVSS 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
High
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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 checks

Work through these to decide whether this CVE applies to you.

  1. Check Synology Router Manager version
    Access the SRM web interface and navigate to Control Panel > System > DSM Update, or run the command 'cat /etc/VERSION' via SSH to view the installed SRM version number.
    Affected if The installed version is 1.3.0 through 1.3.1-9346 (inclusive) - these are the vulnerable versions.
  2. Verify Port Forward functionality is in use
    Navigate to Control Panel > Router > Port Forward in the SRM web interface and check if any port forwarding rules are configured.
    Affected if Port forwarding rules exist in the configuration - the XSS is stored and executes when these rules are rendered.
  3. Inspect port forward rule names for malicious content
    In the Port Forward configuration panel, examine each rule's Name/Description field for unexpected characters, script tags (<script>), JavaScript event handlers (onclick, onerror, etc.), or encoded payloads.
    Affected if Any port forward rule name contains HTML tags, JavaScript code, or suspicious encoded strings that were not entered by trusted administrators.
  4. Review all port forward entries for injected scripts
    Export or document all port forward rules and manually inspect the Protocol, External Port, Internal Port, and Internal IP fields for anomalies, particularly in the rule name field where the XSS is stored.
    Affected if Any field in the port forward configuration contains executable script content or unexpected HTML elements.

You are affected if your SRM version is between 1.3.0 and 1.3.1-9346 inclusive AND you have port forwarding rules configured that contain malicious script or HTML content in their names or descriptions.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 1.3.1-9346 or later
Fixed in 1.3.1-9346
Interim mitigation

Upgrade Synology Router Manager to version 1.3.1-9346-10 or later to patch this vulnerability. As a defensive measure, limit administrative access to trusted personnel and monitor for suspicious port forward configurations.

Recommended fix High confidence

Router Manager 1.3.1-9346-10 or later

  1. 1. Log in to Synology Router Manager (SRM) as administrator
  2. 2. Navigate to Control Panel > System > Update & Restore
  3. 3. Check the current installed version of Router Manager under the DSM version information
  4. 4. If the current version is 1.3.1-9346 or earlier, download Router Manager version 1.3.1-9346-10 or later from the Synology download center (support.synology.com)
  5. 5. In Control Panel > System > Update & Restore, click 'Update Now' and select the downloaded .pat file
  6. 6. Wait for the update process to complete - do not interrupt power or network
  7. 7. After reboot, verify the installed version shows 1.3.1-9346-10 or later under DSM version information
Caveat Standard SRM upgrade considerations apply - ensure backups of configuration are made before updating

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Router Manager Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-53283 in production — separate from our analysis above.

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What this is

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.

What belongs here
  • 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