CVE-2025-27926
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 · uneditedIn Nintex Automation 5.6 and 5.7 before 5.8, the K2 SmartForms Designer folder has configuration files (web.config) containing passwords that are readable by unauthorized users.
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 confidenceIn Nintex Automation versions 5.6 and 5.7, the K2 SmartForms Designer folder contains web.config files that store passwords in plaintext. These configuration files have insufficient access controls, allowing unauthorized users to read them and obtain sensitive credential data.
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>= 5.6, < 5.8CVSS 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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Check Nintex Automation versionOpen Nintex Automation management console or check the installed product version through the control panel, program files, or registry. Compare against affected range: 5.6 to 5.7.xAffected if Installed version is 5.6 or 5.7 (any minor version)
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Locate K2 SmartForms Designer folderNavigate to the Nintex installation directory and find the K2 SmartForms Designer folder, typically under the web root or runtime pathAffected if K2 SmartForms Designer folder exists in the installation directory
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Inspect web.config file permissionsCheck file system permissions on web.config files within the K2 SmartForms Designer folder using icacls or file explorer security propertiesAffected if Users other than administrators or service accounts have read access to these files
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Search for plaintext passwords in web.configOpen web.config files in the K2 SmartForms Designer folder and search for password fields or connection strings containing cleartext credentialsAffected if web.config files contain plaintext passwords or sensitive credential data
Environment is affected if Nintex Automation version is 5.6 or 5.7 AND the K2 SmartForms Designer folder exists with web.config files readable by unauthorized users and containing plaintext passwords.
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 · scoped5.8
Upgrade Nintex Automation to version 5.8 or later, which addresses the improper access control on the web.config files in the K2 SmartForms Designer folder.
Nintex Automation 5.8
- Back up the current Nintex Automation installation and database before upgrading
- Download Nintex Automation 5.8 from the official Nintex portal or vendor distribution channel
- Install the Nintex Automation 5.8 upgrade following the vendor's standard upgrade procedure
- Verify that the upgrade was successful by checking the Nintex Automation version
- Confirm that the web.config files in the K2 SmartForms Designer folder no longer have overly permissive file system permissions that allow unauthorized reading
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 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 $5,568.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-27926 — 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-2025-27926 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