JPCERT/CC has issued a vulnerability note disclosing multiple security flaws in a-blog cms, a popular content management system developed by appleple inc. These vulnerabilities span a range of severities and exploitation methods—including path traversal, cross-site scripting (XSS), server-side request forgery (SSRF), and log injection—collectively presenting significant risks to websites and their users.
The note identifies several vulnerabilities affecting various versions of a-blog cms. These vulnerabilities include:
- Path Traversal (CVE-2025-27566, CVSSv4 5.1): This vulnerability stems from insufficient path validation in the backup feature. Successful exploitation requires administrator privileges, but it can lead to the retrieval or deletion of any file on the server.
- Cross-Site Scripting (CVE-2025-32999, CVSSv4 4.0): This issue resides in a specific field within the entry editing screen. Exploitation necessitates contributor or higher-level privileges and can result in the execution of arbitrary scripts on the web browser of any user logged into the system.
- Server-Side Request Forgery (CVE-2025-36560, CVSSv4 9.2): The advisory also notes a Server-Side Request Forgery vulnerability, but it doesn’t provide specific details about it.
- Improper Output Neutralization for Logs (CVE-2025-41429, CVSSv4 2.1): The advisory also notes an Improper Output Neutralization for Logs vulnerability, but it doesn’t provide specific details about it.
“The combination of these vulnerabilities may allow an attacker to hijack a legitimate user’s session,” warns JPCERT/CC.
The following versions of a-blog cms are affected:
- a-blog cms versions prior to Ver. 3.1.43 (Ver. 3.1.x series)
- a-blog cms versions prior to Ver. 3.0.47 (Ver. 3.0.x series)
- a-blog cms Ver. 2.11.75 and earlier (Ver. 2.11.x series)
- a-blog cms Ver. 2.10.63 and earlier (Ver. 2.10.x series)
- a-blog cms Ver. 2.9.52 and earlier (Ver. 2.9.x series)
- a-blog cms Ver. 2.8.85 and earlier (Ver. 2.8.x series)
- a-blog cms Ver. 2.7.x and earlier versions (now unsupported)
To address these vulnerabilities, it is crucial to take immediate action:
- Update Software: The primary solution is to update a-blog cms to the latest version, as recommended by the developer. This will ensure that the vulnerabilities are patched and the system is secured against potential exploits.
- Apply Workarounds: For specific vulnerabilities (CVE-2025-36560 and CVE-2025-41429), the developer has provided workarounds. It is essential to refer to the developer’s information for detailed instructions on implementing these workarounds.
