CVE-2025-27939
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 · uneditedAn attacker can change registered email addresses of other users and take over arbitrary accounts.
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 confidenceThis vulnerability allows an attacker to modify the email addresses of other users through an Insecure Direct Object Reference (IDOR) or improper authorization check in the user profile/email change functionality. By changing a victim's email address to one the attacker controls, they can then initiate a password reset and take over the account.
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<= 3.6.0CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 Growatt Cloud Portal deploymentCheck your environment for instances of the Growatt Cloud Portal application, typically accessible via web browser at vendor-provided URLs or hosted internallyAffected if Growatt Cloud Portal is present in the environment
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Determine installed versionAccess the application admin panel or check system documentation to identify the deployed version number, then compare against the affected range of version 3.6.0 and belowAffected if The deployed version is 3.6.0 or lower
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Verify email change functionality existsLog into the portal with a test user account and navigate to user profile settings to confirm the presence of an email address change optionAffected if The email change feature is available and enabled in the portal
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Inspect API authorization on email change endpointUse a web proxy or developer tools to intercept requests when modifying an email address, then attempt to modify another users email by changing the user ID parameter in the request to see if authorization is properly enforcedAffected if The API allows email address modification for other user IDs without proper authorization validation
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Review logs for unauthorized email modificationsExamine application and access logs for API calls to email change endpoints that originate from one user account but target another users email addressAffected if Logs show email change requests where the requester and target user do not match
If Growatt Cloud Portal version 3.6.0 or lower is deployed and the email change endpoint can be manipulated to modify other users email addresses without proper authorization, the environment is affected by this CVE.
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 · scopedImplement proper authorization checks to ensure users can only modify their own email address, and require additional verification (such as current password confirmation or email verification links) before allowing email address changes.
Vendor-specific release > 3.6.0 (contact vendor for exact version number)
- Check current Cloud Portal version (typically in About or Settings section)
- Contact the Cloud Portal vendor or check their security advisory for the fixed release version higher than 3.6.0
- Review vendor release notes to confirm the IDOR vulnerability (CVE-2025-27939) is addressed in the new version
- Plan upgrade following vendor's standard upgrade procedure
- After upgrading, verify that the authorization mechanism properly prevents users from modifying other users' email addresses
- Confirm existing users cannot change email addresses belonging to other accounts
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-27939 — 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-2025-27939 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