Privilege escalation in Apple macOS
CVE-2025-55076
A local privilege escalation vulnerability exists in the InstallationHelper service included with Plugin Alliance Installation Manager v1.4.0 for macOS. The service accepts unauthenticated XPC connections and executes input via system(), which may allow a local user to execute arbitrary commands with root privileges.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (10.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Apple macOS
- Plugin-Alliance Installation Manager — versions 1.4.0
Weakness classification (CWE)
References
- almightysec.com/plugin-alliance-helpertool-xpc-service-local-privilege-escalati… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-55076?
- CVE-2025-55076 is a medium-severity vulnerability in Apple macOS, classified under Improper Privilege Management. CVSS score: 6.2/10. Published 2025-12-03.
- How severe is CVE-2025-55076?
- Medium severity. CVSS v3 base score is 6.2 out of 10.