What is CVE-2025-8577?

CVE-2025-8577 is a medium-severity vulnerability in Apple macOS, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2025-08-07.

How severe is CVE-2025-8577?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2025-8577 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Apple macOS

CVE-2025-8577

Inappropriate implementation in Picture In Picture in Google Chrome prior to 139.0.7258.66 allowed a remote attacker who convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2025-8577?: CVE-2025-8577 is a medium-severity vulnerability in Apple macOS, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2025-08-07.
How severe is CVE-2025-8577?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2025-8577 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.