CVE-2025-40646
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 · uneditedExposure of sensitive information in Viday. This vulnerability could allow an attacker to obtain sensitive information about customers by intercepting HTTP requests and searching for the JWT containing sensitive user information in the JWT payload.
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 confidenceViday stores sensitive customer information in plaintext within JWT token payloads. Since JWTs are merely base64-encoded (not encrypted) and can be intercepted from unencrypted HTTP traffic, attackers can easily decode the token and access the sensitive user data contained in the payload.
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= 2025CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 the installed Energy Crm versionLocate the version number in the application administrative interface, or check the product about/help panel, or inspect the software bill of materials if available.Affected if The version is 2025.
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Capture HTTP traffic from the applicationUse a network traffic analyzer (such as Wireshark, Burp Suite, or browser developer tools) to capture HTTP requests and responses traveling between the client and server.Affected if HTTP traffic is transmitted in plaintext (unencrypted).
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Extract JWT tokens from captured trafficSearch the captured traffic for tokens in the Authorization header or cookies that follow the format XXX.YYY.ZZZ (three base64url-encoded segments separated by dots).Affected if JWT tokens are present in the captured traffic.
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Decode the JWT payloadTake the middle segment of the JWT (the payload), base64-decode it, and inspect the resulting JSON for sensitive information.Affected if The decoded payload contains plaintext sensitive customer data such as full names, email addresses, physical addresses, phone numbers, account numbers, or other PII.
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Verify sensitive data exposureReview the decoded JWT payload contents against typical PII fields: name, email, address, phone, customer ID, account details, or financial information.Affected if Any sensitive customer PII appears in plaintext within the JWT payload.
If the installed version is Energy Crm 2025 and the decoded JWT payload contains plaintext sensitive customer information (PII), the environment is affected by this vulnerability.
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 HTTPS to encrypt all HTTP traffic and remove sensitive PII from JWT payloads, using non-sensitive identifiers or claims instead. Consider encrypting JWT payloads if sensitive data must be included.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-40646 — 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-2025-40646 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