Gravity SMTP 2.3.3 fixes a security issue that could expose license keys to unauthorized users. The operational response is not simply to hide the setting. Teams must update the plugin, verify that low-privilege roles can no longer retrieve the value, inspect the realistic access window, and decide whether the vendor key needs replacement without spreading it further through screenshots, logs, tickets, backups, or chat.
Use this for agencies, managed WordPress fleets, membership sites, stores, editorial teams, multisite networks, client portals, and any site where non-administrators can sign in to wp-admin.
Quick answer
Update Gravity SMTP to 2.3.3 or later after a backup and staging check. Create a low-privilege test account and inspect the settings screen, relevant REST or AJAX requests, page source, browser network responses, and logs. The license key must be absent or masked outside the intended administrator capability. Review access logs for requests to the affected surface during the vulnerable window. Rotate the key only according to vendor controls and exposure evidence, then remove test accounts, cached responses, screenshots, and debug output that contain the old value.
Test scenarios to run
Run the same controlled fixture across these branches. Write down the expected result before testing so a surprising response is easy to identify.
| Scenario | Fixture | Expected result |
|---|
| Administrator | Fresh session | Managed value available |
| Subscriber | Direct settings request | No key returned |
| Expired nonce | Captured request | Rejected |
| Cached response | Warm edge and browser | No sensitive copy |
Diagnostic table
Use this table to connect the observed behavior to evidence and a verification step.
| Action | Evidence | Verification |
|---|
| Update Gravity SMTP | Record installed version, update time, site roles, custom capabilities, multisite state, affected settings route, CDN behavior, page cache exclusions, and the key owner's rotation procedure. | Plugin inventory shows Gravity SMTP 2.3.3 or later on production, staging, and recoverable images. |
| Test every relevant role | Test administrator, editor, author, contributor, subscriber, shop manager, custom roles, expired sessions, and direct requests to any REST or AJAX settings endpoint. | Low-privilege and unauthenticated requests return no full license key in HTML, JSON, logs, or cache. |
| Define the access window | Inspect browser HTML, source maps, JSON boot data, network responses, application logs, reverse-proxy logs, support exports, database backups, screenshots, and monitoring payloads for the key. | Vendor licensing and updates still work after any approved key replacement. |
| Decide on key rotation | Separate evidence that a route was requested from evidence that the sensitive response was delivered, and preserve UTC timestamps, user IDs, IP context, and response status. | Temporary accounts, debug logs, screenshots, exports, and test data have been removed or access-restricted. |
What to check first
- Record installed version, update time, site roles, custom capabilities, multisite state, affected settings route, CDN behavior, page cache exclusions, and the key owner's rotation procedure.
- Test administrator, editor, author, contributor, subscriber, shop manager, custom roles, expired sessions, and direct requests to any REST or AJAX settings endpoint.
- Inspect browser HTML, source maps, JSON boot data, network responses, application logs, reverse-proxy logs, support exports, database backups, screenshots, and monitoring payloads for the key.
- Separate evidence that a route was requested from evidence that the sensitive response was delivered, and preserve UTC timestamps, user IDs, IP context, and response status.
- After any rotation, verify updates, license checks, extension downloads, staging copies, deployment secrets, and client ownership without writing the replacement key into a ticket.
Field notes
- Write the pass condition before changing anything and keep one repeatable synthetic fixture for the full test window.
- Record exact versions and UTC timestamps because deployments, caches, retries, scheduled actions, and background jobs can change the evidence.
- Test the public path and the stored server-side result, not only an admin preview, isolated command, or API response.
- Repeat verification after the relevant cache, queue, cron, webhook, and observation window has completed.
Useful command or data shape
Adapt paths, IDs, and privacy handling to the site before running commands or storing data on production.
curl -sS -I --max-time 10 https://example.com/wp-admin/admin.php?page=gravity-smtp
rg 'gravity-smtp|wp-json|admin-ajax' access.log
Why this usually happens
- A settings endpoint checks login status but not the capability required to manage the plugin.
- Bootstrapped page data contains a secret even when the visible field is masked.
- A debug logger records the full settings object during troubleshooting.
- A shared screenshot or database copy extends the exposure beyond the original route.
Decision rule
Close the incident only when all sites run the fixed version, unauthorized roles cannot retrieve the key, access evidence has been reviewed, the rotation decision is documented, and secondary copies are controlled.
Production verification checklist
- Plugin inventory shows Gravity SMTP 2.3.3 or later on production, staging, and recoverable images.
- Low-privilege and unauthenticated requests return no full license key in HTML, JSON, logs, or cache.
- Vendor licensing and updates still work after any approved key replacement.
- Temporary accounts, debug logs, screenshots, exports, and test data have been removed or access-restricted.
Safe fix order
Use a sequence that makes each result easy to prove. Stop when new evidence changes the scope or owner of the problem.
- Update Gravity SMTP
- Test every relevant role
- Define the access window
- Decide on key rotation
- Clean secondary copies
Mistakes to avoid
- Changing production before recording exact versions, UTC timestamps, a stable fixture, the expected result, and a tested rollback point.
- Treating one successful screen as proof while stored records, logs, queues, caches, emails, APIs, and downstream systems remain unchecked.
- Testing only as an administrator instead of using the role, device, locale, cache state, payment state, and failure branch that customers reach.
- Leaving temporary exclusions, debug output, test accounts, broad permissions, or one-off repair code active after verification.
Questions teams ask during testing
Can I run this directly in production?
Begin with read-only evidence and use staging for package, database, checkout, form, permission, or security changes. If a production canary is necessary, make it identifiable, reversible, monitored, and unable to expose personal data or charge a customer.
How do I avoid a false positive?
Repeat the same fixture with the same versions, role, URL, locale, cache state, and integrations. Compare browser, stored, API, and log evidence instead of relying on one screen.
What should the evidence packet contain?
Keep UTC time, exact versions, synthetic record ID, expected result, actual result, relevant log lines, change made, rollback point, owner, and final verification. Redact secrets and personal data.
When is the test complete?
Close the work when the primary path passes, failure branches are understood, stored and downstream records reconcile, temporary changes are removed, and monitoring covers the next update.
What to tell the client or owner
Give the owner a concise packet with the affected workflow, exact versions, UTC test time, fixture ID, expected result, actual result, key logs, change made, rollback point, final result, unresolved risks, owner, and next review date. Remove credentials and personal data before sharing it.
When HandL WP should help
Bring in help when this affects leads, checkout, search visibility, security, paid media reporting, or a client production site. HandL WP can trace the issue through WordPress, hosting, cache, tracking, and Search Console, then verify the workflow after the technical fix.
If this is active on a production site, have HandL WP scope a WordPress key exposure.
Related HandL WP guides
Use these related guides when the same issue touches tracking, security, checkout, or crawler visibility.
Complete the Gravity SMTP 2.3.3 operational tests
After the security review, test Amazon SES Tenant and Members routing, verify OAuth redirect URI parity across staging and production, and run the multibyte subject logging parity test for the providers and languages the site actually uses.
Run the remaining Gravity SMTP 2.3.3 recovery tests
Multisite operators can extend this review with the shared license key multisite isolation audit. For mail and installation incidents, use the string attachment header fatal error test and the first-install MySQL recovery guide before broad cleanup or retries.
Helpful references