CVE-2026-31049
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 · uneditedAn issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code and escalate privileges via the CSV registration field
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 · moderate confidenceHostbill billing software versions 2025-11-24 and 2025-12-01 contain a critical vulnerability in the CSV registration field processing that allows remote attackers to inject and execute arbitrary code, potentially achieving privilege escalation to administrative levels.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/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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Identify Hostbill installationLook for Hostbill billing software in your web root directory (commonly /var/www/html, /home/user/public_html, or similar). Check for files like config.php, includes/App.php, or the characteristic Hostbill directory structure.Affected if Hostbill software is present on the server
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Check installed Hostbill versionLocate the version file or check the admin dashboard for the exact version number. Common locations include includes/version.php, VERSION.txt, or the About section in the admin panel.Affected if The installed version matches 2025-11-24 or 2025-12-01 exactly
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Verify CSV import feature statusLog into the Hostbill admin panel and navigate to Settings > Registration Fields or Settings > Custom Fields. Look for any CSV import or bulk import functionality related to registration fields.Affected if CSV import functionality for registration fields is enabled and accessible
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Check for unauthorized admin accountsIn the admin panel, go to Settings > Administrators or Staff Management. Review the list of admin accounts for any unexpected or unauthorized entries, especially those created around the time of the vulnerability disclosure.Affected if Unexpected admin accounts exist or recent admin account creation is observed
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Audit web server access logsReview web server access logs (Apache/nginx) for requests to registration processing endpoints with CSV content-type headers or unusual parameters around the affected version deployment dates.
You are affected if Hostbill is installed and the version is exactly 2025-11-24 or 2025-12-01, with CSV registration field import functionality enabled.
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 vendor patches as soon as available; until then, restrict network access to the Hostbill administrative interfaces and disable CSV import functionality in registration if possible.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-31049 — 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-2026-31049 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