CVE-2021-27758
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 · uneditedThere is a security vulnerability in login form related to Cross-site Request Forgery which prevents user to login after attacker spam to login and system blocked victim's account.
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 confidenceA CSRF vulnerability exists in the login form that allows attackers to programmatically spam login attempts (likely by tricking users into visiting malicious pages that submit login requests via CSRF), causing the system to incorrectly block legitimate user accounts due to excessive failed login attempts.
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>= 9.0, < 10.0.7.0CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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 installed Bigfix Inventory versionCheck the version of Hcltech Bigfix Inventory currently deployed in your environment. This is typically found in the product console, about section, or via administrative command line tools provided by the product.Affected if The installed version is greater than or equal to 9.0 but less than 10.0.7.0
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Inspect login form HTML for anti-CSRF tokenView the HTML source code of the Bigfix Inventory login page to determine if a unique anti-CSRF token or session token is generated and embedded in the login form as a hidden field.Affected if The login form does not contain any anti-CSRF token or unique session validation token in its HTML
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Check if rate limiting is configured on loginReview the Bigfix Inventory security or authentication configuration settings to determine if rate limiting or account lockout thresholds are enforced on login attempts.Affected if Rate limiting is not configured or the account lockout threshold is set such that automated login attempts could trigger legitimate account lockouts
Your environment is affected if Bigfix Inventory version is between 9.0 and 10.0.7.0 AND the login form lacks anti-CSRF token validation AND rate limiting is not in place.
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 · scoped10.0.7.0
Implement anti-CSRF tokens on login forms and add CAPTCHA or rate-limiting to prevent automated login attempts from triggering account lockouts.
Bigfix Inventory 10.0.7.0
- 1. Review HCL Bigfix Inventory release notes at support.hcltechsw.com for version 10.0.7.0 to understand changes and prerequisites
- 2. Back up the current Bigfix Inventory database and configuration
- 3. Download the Bigfix Inventory version 10.0.7.0 from the HCL Flexera portal or authorized distribution channel
- 4. Review the upgrade documentation for Bigfix Inventory version 10.0.7.0
- 5. Test the upgrade in a non-production environment first
- 6. Apply the upgrade to production during a scheduled maintenance window
- 7. Verify the CSRF vulnerability is resolved by attempting the login form attack scenario
- 8. Confirm normal user login functionality is restored after the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,480.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27758 — 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-2021-27758 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