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Message-ID: <20251204162045.GB2659024@igalia.com>
Date: Thu, 4 Dec 2025 16:20:45 +0200
From: Adrian Perez de Castro <aperez@...lia.com>
To: webkit-gtk@...ts.webkit.org, webkit-wpe@...ts.webkit.org
Cc: security@...kit.org, oss-security@...ts.openwall.com
Subject: WebKitGTK and WPE WebKit Security Advisory WSA-2025-0009
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WebKitGTK and WPE WebKit Security Advisory WSA-2025-0009
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Date reported : December 04, 2025
Advisory ID : WSA-2025-0009
WebKitGTK Advisory URL : https://webkitgtk.org/security/WSA-2025-0009.html
WPE WebKit Advisory URL : https://wpewebkit.org/security/WSA-2025-0009.html
CVE identifiers : CVE-2025-13502, CVE-2025-13947,
CVE-2025-43421, CVE-2025-43458,
CVE-2025-66287.
Several vulnerabilities were discovered in WebKitGTK and WPE WebKit.
CVE-2025-13502
Versions affected: WebKitGTK and WPE WebKit before 2.50.3.
Credit to Stanislav Fort, Aisle Research.
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash. Description: A buffer overflow was
addressed with improved bounds checking.
WebKit Bugzilla: 302218
CVE-2025-13947
Versions affected: WebKitGTK and WPE WebKit before 2.50.3.
Credit to Janet Black.
Impact: A website may be able to exfiltrate sensitive system
information. Description: The issue was addressed through improved
state checks.
WebKit Bugzilla: 271957
CVE-2025-43421
Versions affected: WebKitGTK and WPE WebKit before 2.50.3.
Credit to Nan Wang (@eternalsakura13).
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash. Description: Multiple issues were
addressed by disabling array allocation sinking.
WebKit Bugzilla: 300718
CVE-2025-43458
Versions affected: WebKitGTK and WPE WebKit before 2.50.3.
Credit to Phil Beauvoir.
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash. Description: This issue was addressed
through improved state management.
WebKit Bugzilla: 296693
CVE-2025-66287
Versions affected: WebKitGTK and WPE WebKit before 2.50.3.
Credit to Stanislav Fort, Aisle Research.
Impact: Processing maliciously crafted web content may lead to an
unexpected process crash. Description: The issue was addressed with
improved memory handling.
WebKit Bugzilla: 302220
We recommend updating to the latest stable versions of WebKitGTK and WPE
WebKit. It is the best way to ensure that you are running safe versions
of WebKit. Please check our websites for information about the latest
stable releases.
Further information about WebKitGTK and WPE WebKit security advisories
can be found at: https://webkitgtk.org/security.html or
https://wpewebkit.org/security.
The WebKitGTK and WPE WebKit team,
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