CVE-2025-24201KEV · OVERDUE

Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability

Critical · published March 11, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 10.0. It is confirmed in active exploitation. It sits in the 90.1th percentile for exploit probability.

568
days past CISA
deadline
CVSS v3.1
10.0
EPSS
4%
Percentile
90.1
In the wild
Confirmed
What it is

🚨 An out-of-bounds write vulnerability is lurking in various versions of Safari and iOS, and it’s as sneaky as a magician getting out of handcuffs! 🔥 Think of this vulnerability like a mischievous child who finds a way to slip out of a playpen — they can get into places they shouldn't, potentially causing chaos in a secure environment. Just like how a loose child can rummage through a kitchen, this flaw allows malicious web content to break out of the Web Content sandbox, leading to unauthorized actions. If exploited, an attacker could escape the restricted area and gain unauthorized control, potentially leading to data leaks, unauthorized actions, or complete system compromise. This is particularly concerning as it’s reportedly been used in highly sophisticated attacks against targeted individuals, making it absolutely devastating!

Put simply

Think of this vulnerability like a mischievous child who finds a way to slip out of a playpen — they can get into places they shouldn't, potentially causing chaos in a secure environment. Just like how a loose child can rummage through a kitchen, this flaw allows malicious web content to break out of the Web Content sandbox, leading to unauthorized actions. This out-of-bounds write issue allows attackers to manipulate memory in a way that can break out of the sandbox environment that manages web content—essentially letting harmful web content bypass security controls.

What to do

If exploited, an attacker could escape the restricted area and gain unauthorized control, potentially leading to data leaks, unauthorized actions, or complete system compromise. This is particularly concerning as it’s reportedly been used in highly sophisticated attacks against targeted individuals, making it absolutely devastating! Update immediately to Safari 18.3.1, iOS 15.8.4, or the latest versions available for your device. Ensure all devices are running the patched versions of iPadOS, macOS Sequoia, and other affected software to close this critical vulnerability. Don't delay! You've got this! By applying these updates, you're stepping up as a security hero and keeping your devices safe! 🛡️

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.03847 · 90.1th percentile
Published
2025-03-11T18:07Z
KEV added
2025-03-13 · due 2025-04-03
EPSS history
Timeline
  • 13 MAR 00:00Z
    Added to CISA KEV — remediate by Apr 3
    kev
  • 11 MAR 18:07Z
    An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions
    cvelistv5