CVE-2025-41429 is a medium severity flaw (CVSS 4.8) in a-blog cms, which neutralizes log output improperly. Combined with CVE-2025-36560, a remote attacker may hijack a legitimate user session. Update to the latest release and apply the developer workaround, listed in the advisory.
What's affected
JVN advisory JVNVU#90760614, published on 14 May 2025, lists CVE-2025-36560 and CVE-2025-41429 as affecting a-blog cms 3.1.43 and earlier in the 3.1.x series, 3.0.47 and earlier in 3.0.x, 2.11.75 and earlier in 2.11.x, 2.10.63 and earlier, 2.9.52 and earlier, and 2.8.85 and earlier.
The developer says that versions 2.7.x and earlier, which are no longer supported, are affected too. The a-blog cms developer notice says no fixed version exists for those old lines.
The other two CVEs in the advisory, CVE-2025-27566 and CVE-2025-32999, affect versions before 3.1.43 and before 3.0.47. This entry stands apart because the problem only becomes serious when chained with CVE-2025-36560, a server-side request forgery rated 8.6 by JVN.
How to check if you're exposed
Check the version in the a-blog cms admin screen or in your deployment files, and compare it with the lists above. If you are on 3.1.x or 3.0.x, check what the newest release is on the developer site.
Next, look for the workaround. The developer notice describes changes to the server configuration and to a hook file. I will not repeat the code here, so read the notice directly and check that the change is in place on every site.
Finally, review who can reach the site. The CVSS vector rates this issue as high attack complexity, which is why the severity is medium, but the paired flaw lifts the risk.
What to do now
- Update a-blog cms to the latest release for your series.
- Apply the developer workaround for CVE-2025-36560 and CVE-2025-41429 if you cannot update immediately.
- If you run a version in the unsupported 2.7.x or older lines, plan a migration, because no fix exists for them.
- Review web and application logs for signs of tampering, and protect log viewers by treating log content as untrusted.
- Read the JVN advisory in full for the other two CVEs.
Why it matters
The weakness is CWE-117, improper output neutralization for logs. Text that comes from a request is written into a log without being cleaned, so an attacker can shape what the log says. By itself that is a minor issue. The danger appears when someone or something later trusts the log content.
JVN notes that the combination with CVE-2025-36560 may allow session hijacking. A medium rating on one CVE can hide a serious chain. This CVE is not on the CISA Known Exploited Vulnerabilities list, but it is a good reminder to read a CVE with its neighbors, not alone.
Quick check
Why is this only rated medium?
The score is 4.8 because the vector needs high attack complexity and the direct impact is low. The real concern is the chain with CVE-2025-36560.
Is there a workaround?
Yes. The a-blog cms developer published one for CVE-2025-36560 and CVE-2025-41429. Read the notice for the exact steps.
Sources
- JVN: JVNVU#90760614, multiple vulnerabilities in a-blog cms
- a-blog cms developer notice (Japanese)
- Safeguard Gold entry
Last reviewed: 18 October 2026.
