Information disclosure in Free5gc Udr
CVE-2025-69253
free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of the User Data Repository are affected by Improper Error Handling with Information Exposure. The NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be vulnerable. free5gc/udr pull request 56 contains a patch. No direct workaround is available at the application level. Applying the official patch is recommended.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- Free5gc Udr — versions <= 1.4.1
Weakness classification (CWE)
References
- github.com/free5gc/free5gc/security/advisories/GHSA-cj2h-x8qm-xgwc (Vendor Advisory)
- github.com/free5gc/free5gc/issues/753 (Exploit, Issue Tracking, Vendor Advisory)
- github.com/free5gc/udr/pull/56 (Patch, Issue Tracking, Vendor Advisory)
- github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4 (Patch)
Frequently asked questions
- What is CVE-2025-69253?
- CVE-2025-69253 is a medium-severity vulnerability in Free5gc Udr, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2026-02-24.
- How severe is CVE-2025-69253?
- Medium severity. CVSS v3 base score is 5.3 out of 10.