What is CVE-2025-47154?

CVE-2025-47154 is a critical-severity vulnerability in Ladybird, classified under CWE-820. CVSS score: 9.0/10. Published 2025-05-01.

How severe is CVE-2025-47154?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2025-47154 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ladybird

CVE-2025-47154

LibJS in Ladybird before f5a6704 mishandles the freeing of the vector that arguments_list references, leading to a use-after-free, and allowing remote attackers to execute arbitrary code via a crafted .js file. NOTE: the GitHub README says…

EPSS: 0.011 (78.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ladybird — versions 0

Weakness classification (CWE)

CWE-820

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2025-47154?: CVE-2025-47154 is a critical-severity vulnerability in Ladybird, classified under CWE-820. CVSS score: 9.0/10. Published 2025-05-01.
How severe is CVE-2025-47154?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2025-47154 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.