CVE-2025-43515
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 · uneditedThe issue was addressed by refusing external connections by default. This issue is fixed in Compressor 4.11.1. An unauthenticated user on the same network as a Compressor server may be able to execute arbitrary code.
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 confidenceCompressor server (video encoding software) allowed unauthenticated remote code execution from network-connected attackers. The vulnerability was exploitable by any user on the same network segment without authentication, allowing arbitrary code execution on the server. The fix implements denial of external connections by default.
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< 4.11.1CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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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Check installed Compressor versionOpen macOS Finder, go to Applications folder, right-click Compressor.app, select Get Info, or run: defaults read /Applications/Compressor.app/Contents/Info.plist CFBundleVersionAffected if Version is below 4.11.1 (e.g., 4.11.0, 4.10.x, etc.)
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Verify Compressor server statusOpen Compressor, go to Compressor > Settings > General tab, look for 'Enable Compressor Server' or 'Allow Remote Connections' checkboxAffected if Server/remote connections are enabled
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Check network listening statusRun in Terminal: lsof -i -P | grep -i compressor or: ps aux | grep -i compressord to see if the server daemon is actively listening on network portsAffected if Compressor process is listening on TCP ports (typically 8080, 8443, or similar) accessible from network
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Inspect firewall configurationRun: sudo /usr/libexec/ApplicationFirewall/socketfilterfw --listapps | grep -i compressor to see if Compressor is allowed in the firewallAffected if Compressor is permitted through the firewall and accepts incoming connections
You are affected if Compressor version is below 4.11.1 AND the Compressor server feature is enabled, allowing unauthenticated network access to the encoding service.
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 · scoped4.11.1
Upgrade to Compressor 4.11.1 or later, and ensure network segmentation/firewall rules restrict access to only trusted internal systems.
Compressor 4.11.1
- Check current Compressor version via Compressor > About Compressor
- Download Compressor 4.11.1 or later from the Mac App Store or Apple website
- Close any running Compressor instances
- Install the updated Compressor application
- If external connections were previously required, configure access via Compressor > Settings > Network to allow trusted hosts if needed
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 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 $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43515 — 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-2025-43515 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