CVE-2025-66287 | Webkitgtk: processing maliciously crafted web content may lead to an unexpected process crash

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

Published: 2025-12-04 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-66287 is rated Moderate Risk (46/100): CVSS High severity, with low exploitation likelihood (EPSS 0.39%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-66287

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.39% +0.31%
2 2026-05-14 0.05% 0.07% +0.02%
3 2026-05-02 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-66287

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2025-66287

OS Trackers for CVE-2025-66287

vendor priority summary link
debian end-of-life CVE-2025-66287 end-of-life priority: Debian including 2 source packages (webkit2gtk, wpewebkit), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7, open 3. https://security-tracker.debian.org/tracker/CVE-2025-66287
redhat high — https://access.redhat.com/security/cve/CVE-2025-66287
suse high CVE-2025-66287 severity important: SUSE including 112 source package names (2.2.0-4.55:gpg2-2.4.4-slfo.1.1_2.1, 2.2.1-7.2:gpg2-2.4.4-slfo.1.1_2.1, …), 499 product×package rows across 72 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (72 product lines)): Fixed 481, First Fixed 18. https://www.suse.com/security/cve/CVE-2025-66287/
ubuntu medium CVE-2025-66287 medium priority: Ubuntu including 5 source packages (qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk, wpewebkit), 36 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): ignored 14, DNE 13, released 6, needs-triage 3. https://ubuntu.com/security/CVE-2025-66287

Affected software / configurations for CVE-2025-66287

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-66287

cvelogic Threat Intelligence