CVE-2025-3398 is a medium severity (CVSS 6.3) improper access control flaw in lenve VBlog up to version 1.0.0. The configure function in WebSecurityConfig.java does not enforce access properly. The vendor did not respond to the disclosure, so no fix is confirmed. Restrict access and review the security configuration.
What's affected
The record lists lenve VBlog up to and including 1.0.0. The affected code is the function configure in blogserver/src/main/java/org/sang/config/WebSecurityConfig.java, which is where a Spring based application normally declares which requests need authentication.
No fixed version is confirmed in the record or in the pages reviewed for this post. Ask the vendor for current status and check its advisory before you rely on any version number. The record says the vendor was contacted early and did not respond, and that the exploit has been disclosed to the public.
How to check if you're exposed
If you run VBlog, check the version in your build file or the release you deployed. Anything up to 1.0.0 is in range.
Because the problem sits in the security configuration, a code review is the fastest check. Open WebSecurityConfig.java and read the configure method. Look at which URL patterns are marked as open and which require a role. Compare that list to the endpoints the application exposes, and confirm that administrative and content management endpoints need a login.
The CVSS vector says a low privilege account is required (PR:L), so also review who has accounts on the system.
This is a shipped product or appliance, not a package you import, so a manifest scan will not list it. Use your asset inventory, procurement records or network discovery to find every instance, then compare the version you find against the fixed version in the vendor notes. Safeguard's free in-browser dependency scan and the Gold directory are useful for the open source parts of your estate, and you can look up this CVE in Gold to see how it is tracked.
What to do now
- Find every VBlog deployment, including personal and test instances.
- Review the configure method in WebSecurityConfig.java and tighten any rule that allows broader access than intended.
- Put the application behind a reverse proxy or VPN so only trusted users reach administrative paths.
- Remove or disable accounts you do not need and use unique passwords for the rest.
- Ask the project and its maintainer for a fixed release, and consider migrating if none is planned.
- Review access logs for requests to administrative paths from unexpected addresses.
Why it matters
The record maps this to CWE-284, improper access control, and CWE-266, incorrect privilege assignment. In plain terms, the application decides who may do what in the wrong place or with the wrong rules, so a user can reach functions that were meant for someone else.
The score is medium because the attacker needs a low privilege account and the impact on each of confidentiality, integrity and availability is rated low. Small open source projects often have no maintained security channel, which is why the practical answer here is isolation and review. The record does not flag exploitation in the wild and the CVE is not on the CISA KEV list.
Quick check
Is there a patched VBlog release?
None is confirmed in the record. The vendor did not respond, so check the project directly and apply the access controls above.
Sources
- Public write up cited in the record (could not be retrieved when this post was reviewed)
- VulDB entry cited in the record
Last reviewed: 18 October 2026.
