Threats / Apple / CVE-2023-28204
CVE-2023-28204
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Apple Multiple Products vulnerability
Out-of-bounds read in WebKit affects Apple platforms and Safari, potentially disclosing sensitive information through maliciously crafted web content.
Verdict
Today item — known-exploited.
An out-of-bounds read vulnerability in WebKit allows attackers to disclose sensitive information by processing malicious web content. The vulnerability affects multiple Apple operating systems and Safari, as well as third-party products using WebKit for HTML processing.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
9 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-05-22).
Probability (EPSS)
EPSS 0.14406 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Apple, Multiple Products. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-125 Out-of-bounds Read — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft malicious web content designed to trigger an out-of-bounds read in the WebKit HTML parser.
Business
Sensitive data resident in adjacent memory regions becomes accessible to unauthorized parties, creating information disclosure risk.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I host or distribute the malicious content through web pages, advertisements, or compromised sites targeting WebKit-based browsers.
Business
User devices visiting affected content face memory disclosure without user awareness or consent, compromising data confidentiality.
3
Lateral reach — past segmentation narrative 3
Attacker
I extract disclosed memory contents to identify credentials, tokens, or other sensitive application state.
Business
Compromised credentials or session tokens enable lateral movement and unauthorized access to user accounts and services.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05