CVE-2025-31205

The issue was addressed with improved checks. This issue is fixed in watchOS 11.5, tvOS 18.5, iOS 18.5 and iPadOS 18.5, macOS Sequoia 15.5, visionOS 2.5, Safari 18.5. A malicious website may exfiltrate data cross-origin.

Weakness

The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Affected Software

Potential Mitigations

• Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
• For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
• Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
• Use the “double-submitted cookie” method as described by Felten and Zeller:
• When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
• Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
• This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/111.html
• https://cwe.mitre.org/data/definitions/462.html
• https://cwe.mitre.org/data/definitions/467.html
• https://cwe.mitre.org/data/definitions/62.html

References

• https://support.apple.com/en-us/122404
• https://support.apple.com/en-us/122716
• https://support.apple.com/en-us/122719
• https://support.apple.com/en-us/122720
• https://support.apple.com/en-us/122721
• https://support.apple.com/en-us/122722
• http://seclists.org/fulldisclosure/2025/May/10
• http://seclists.org/fulldisclosure/2025/May/12
• http://seclists.org/fulldisclosure/2025/May/13
• http://seclists.org/fulldisclosure/2025/May/5
• http://seclists.org/fulldisclosure/2025/May/7
• https://lists.debian.org/debian-lts-announce/2025/06/msg00016.html