CVE-2025-48382: 
Java vulnerability analysis and mitigation

Fess, a deployable Enterprise Search Server, was found to have a security vulnerability (CVE-2025-48382) prior to version 14.19.2. The vulnerability was discovered and disclosed in May 2025, affecting the createTempFile() method in org.codelibs.fess.helper.SystemHelper which creates temporary files without explicitly setting restrictive permissions (GitHub Advisory, NVD).

The vulnerability is classified as CWE-732 (Incorrect Permission Assignment for Critical Resource) and has received a CVSS 4.0 score of 1.2 (LOW) with the vector string CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U. The technical issue stems from the createTempFile() method not implementing proper file permission restrictions when creating temporary files (Wiz, NVD).

The vulnerability primarily affects environments where Fess is deployed in a shared or multi-user context, potentially leading to information disclosure by allowing unauthorized local users to access sensitive data contained in these temporary files. However, typical single-user or isolated deployments have minimal or negligible practical impact (GitHub Advisory, Wiz).

The vulnerability has been patched in Fess version 14.19.2. The fix includes implementing proper file permissions by setting files to be readable and writable only by the owner. For users unable to update immediately, a workaround involves ensuring local access to the environment running Fess is restricted to trusted users only (GitHub Commit, GitHub Advisory).

The vulnerability was initially reported by security researcher simei2k, and the Fess development team acknowledged the issue while noting that typical deployment scenarios do not involve shared or multi-user environments. However, they implemented the fix as a security best practice (GitHub Advisory).