What is CVE-2025-48219?

CVE-2025-48219 is a low-severity vulnerability in O2 Uk, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 3.5/10. Published 2025-05-18.

How severe is CVE-2025-48219?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in O2 Uk

CVE-2025-48219

O2 UK before 2025-05-19 allows subscribers to determine the Cell ID of other subscribers by initiating an IMS (IP Multimedia Subsystem) call and then reading the utran-cell-id-3gpp field of a Cellular-Network-Info SIP header, aka an ECI (E-UTRAN Cell Identity) leak. The Cell ID might be usable to identify a cell location via crowdsourced data, and might correspond to a small physical area (e.g., if the called party is in a city centre). Removal of the Cellular-Network-Info header is mentioned in section 4.4.19 of ETSI TS 124 229.

EPSS: 0.003 (20.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N.

Affected products

O2 Uk — versions 0

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

References

Frequently asked questions

What is CVE-2025-48219?: CVE-2025-48219 is a low-severity vulnerability in O2 Uk, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 3.5/10. Published 2025-05-18.
How severe is CVE-2025-48219?: Low severity. CVSS v3 base score is 3.5 out of 10.