CVE-2025-48219 Information disclosure in O2
O2 UK subscribers can leak other users' Cell IDs via SIP headers, potentially revealing their physical location.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-48219?
CVE-2025-48219 is a low-severity vulnerability in O2, published on 18 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-201
Which versions are affected by CVE-2025-48219?
How do I fix CVE-2025-48219?
No fix has been published for CVE-2025-48219 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-48219 being exploited?
There is no known exploitation of CVE-2025-48219 in the wild and no public exploit code.
Sources
Also known as GHSA-7rcm-4jcj-r4q6.