CVE-2020-26524
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 · uneditedCodeLathe FileCloud before 20.2.0.11915 allows username enumeration.
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 confidenceCodeLathe FileCloud versions before 20.2.0.11915 contain a username enumeration vulnerability that allows attackers to determine valid usernames within the system through differential responses during authentication or account recovery flows, facilitating further attacks like credential stuffing or brute force.
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< 20.2.0.11915CVSS 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
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 FileCloud versionAccess the FileCloud admin dashboard and navigate to Settings > System > About, or check the login page footer for the version number. Alternatively, inspect the filecloud/VERSION file or the install config if accessible.Affected if The displayed version is less than 20.2.0.11915 (for example, 20.1.x or earlier)
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Confirm authentication endpoints are accessibleVerify that the FileCloud login page (typically at /index.php/login or /login) and/or the password recovery function (often at /index.php/user/forgotpassword) are exposed and operational.Affected if These endpoints are publicly or internally accessible without additional restrictions
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Test for username enumeration in login flowSubmit a login attempt with a known-valid username and capture the response, then submit with a random invalid username and compare the error messages or response codes. Look for differences such as 'Invalid password' versus 'User not found' or timing differences between responses.Affected if The system returns distinctly different messages or responses for valid versus invalid usernames, or responds noticeably faster to valid usernames
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Test for username enumeration in password recovery flowSubmit a password recovery request using a known-valid email/username and compare the response to one using a random non-existent email/username. Check for differences in error messages, success messages, or response timing.Affected if The system indicates whether the submitted email/username exists in the system through its response (for example, 'If that email exists, we sent a link' versus directly showing existence)
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Review authentication error message configurationAccess FileCloud admin settings and inspect the authentication or security settings for configured error messages during failed login attempts. Check if generic messages are enforced.Affected if The system is configured to display specific error messages that reveal account existence rather than generic 'Invalid credentials' messages
You are affected if your FileCloud version is below 20.2.0.11915 AND your login or password recovery endpoints return different responses for valid versus invalid usernames, allowing an attacker to enumerate existing accounts.
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 data20.2.0.11915
Upgrade FileCloud to version 20.2.0.11915 or later. Additionally, implement generic error messages for authentication failures that do not reveal whether a username or email exists in the system.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-26524 — 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-2020-26524 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
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