VDB-318127 · CVE-2025-43209 · Nessus 243011

Apple iOS/iPadOS Web out-of-bounds

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$5k-$25k	0.00

Summaryinfo

A vulnerability was found in Apple iOS and iPadOS. It has been classified as problematic. The impacted element is an unknown function of the component Web Handler. This manipulation causes out-of-bounds. This vulnerability is tracked as CVE-2025-43209. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Apple iOS and iPadOS (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the component Web Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.6, iPadOS 17.7.9, iOS 18.6 and iPadOS 18.6, tvOS 18.6, macOS Sonoma 14.7.7, watchOS 11.6, visionOS 2.6, macOS Ventura 13.7.7. Processing maliciously crafted web content may lead to an unexpected Safari crash.

It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2025-43209 since 04/16/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/02/2025).

The vulnerability scanner Nessus provides a plugin with the ID 243011 (macOS 13.x < 13.7.7 Multiple Vulnerabilities (124151)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (243011). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 243011
Nessus Name: macOS 13.x < 13.7.7 Multiple Vulnerabilities (124151)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
07/30/2025 +105 days Advisory disclosed
07/30/2025 +0 days VulDB entry created
08/02/2025 +3 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2025-43209 (🔒)
GCVE (CVE): GCVE-0-2025-43209
GCVE (VulDB): GCVE-100-318127
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 07/30/2025 08:16
Updated: 08/02/2025 15:00
Changes: 07/30/2025 08:16 (55), 07/31/2025 03:50 (1), 08/02/2025 15:00 (2)
Complete: 🔍
Cache ID: 216::103