Is CVE-2023-4863 actively exploited?

Yes. CVE-2023-4863 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-4863 be exploited remotely?

The attack vector of CVE-2023-4863 has not been classified yet.

What is the CVSS score of CVE-2023-4863?

CVE-2023-4863 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-4863

HIGHCISA KEVIN THE WILD

CVE-2023-4863

Published: September 13, 2023

EPSS:94.12%probability of exploitation in 30 daysPercentile:99.9th

Official Description

Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec.

NVD Source

CISA KEV Advisory

Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

Added to KEV: 2023-09-13Federal patch deadline: 2023-10-04

Required Action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Risk Analysis

Google Chromium WebP contains a heap-based buffer overflow, allowing a remote attacker to write out-of-bounds memory via a crafted HTML page. This vulnerability affects applications using the WebP Codec and is critical due to its EPSS score of 0.94117 and inclusion in CISA's KEV list.

This vulnerability is actively being exploited in the wild. Attackers can trigger the flaw remotely by enticing users to visit a malicious HTML page.

Recommended Action

Update Google Chromium and any applications utilizing the WebP Codec to the latest patched versions. Users should exercise caution when opening untrusted web pages or files.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-4863 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-4863 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.