CVE-2021-42544
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 · uneditedMissing Rate Limiting in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on the Login Form allows an unauthenticated remote attacker to perform multiple login attempts, which facilitates gaining privileges.
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 confidenceMissing rate limiting on the TopEase® Platform login form (version <= 7.1.27) allows unauthenticated remote attackers to perform unlimited login attempts, enabling brute force attacks to guess credentials and gain unauthorized access.
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<= 7.1.27CVSS 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 if TopEase platform is presentCheck your web server, application directory, or running services for TopEase or Businessdnasolutions Topease installation. Look for directories named 'topease', 'top-ease', or applications responding with TopEase branding in HTTP headers or page content.Affected if TopEase platform is installed and accessible
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Determine installed versionLocate the version information for your TopEase installation. Check the application admin panel, version file, or footer of login pages for version numbers. Compare against the affected range: <= 7.1.27Affected if Installed version is 7.1.27 or lower
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Verify rate limiting configuration on login formInspect the application configuration, web server settings, or WAF rules for rate limiting policies targeting the login endpoint. Check if there are any rules limiting failed authentication attempts per IP address or account.Affected if No rate limiting is configured or enforced on the login form
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Review authentication logs for brute force patternsExamine web server access logs, application authentication logs, or security event logs for the login endpoint. Look for repeated failed login attempts from the same IP address or targeting the same user account within short time periods.Affected if Logs show repeated failed login attempts without any blocking or throttling
You are affected if TopEase version 7.1.27 or lower is installed and no rate limiting is enforced on the login form, allowing unlimited authentication attempts.
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 dataImplement rate limiting on the login form—either at the application level (tracking failed attempts per account/IP) or via a WAF/edge proxy—to restrict the number of login attempts within a given time window.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-42544 — 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-2021-42544 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