CVE-2021-26267
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 · uneditedcPanel before 92.0.9 allows a MySQL user (who has an old-style password hash) to bypass suspension (SEC-579).
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 confidencecPanel before version 92.0.9 contains an authorization bypass vulnerability where MySQL users authenticating with old-style password hashes (pre-MySQL 4.1 format) can bypass account suspension restrictions, allowing continued access to database resources despite being suspended.
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< 92.0.9CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.
-
Identify cPanel versionLocate the cPanel version installed on your server (typically available in the server dashboard, WHM interface, or via command line tools provided by cPanel)Affected if The installed version is before 92.0.9 (any version number less than 92.0.9 indicates vulnerability to this bypass)
-
Enumerate MySQL user accountsQuery your MySQL database to list all database users and examine their authentication credentialsAffected if Any MySQL user account is using pre-MySQL 4.1 old-style password hashes (legacy authentication format)
-
Verify account suspension statusReview cPanel account management interface or command tools to identify suspended accounts in your environmentAffected if There are suspended cPanel accounts that have associated MySQL database access
-
Confirm legacy MySQL authentication is activeCheck MySQL server configuration and user authentication settings to determine if old-style password authentication is permittedAffected if The MySQL server allows or still supports authentication using pre-MySQL 4.1 password hash format
Your environment is affected if you are running cPanel versions before 92.0.9 AND have suspended accounts with MySQL users that authenticate using old-style (pre-MySQL 4.1) password hashes, as these users can bypass suspension to access database resources.
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 data92.0.9
Upgrade cPanel to version 92.0.9 or later to patch the authorization bypass. Additionally, consider migrating MySQL user passwords to the newer hashing format to eliminate legacy authentication vectors.
- Consultation1.0 h
- Implementation2.0 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 $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-26267 — 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-2021-26267 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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