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CVE-2025-47154

Date: April 30, 2025

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 "Ladybird is in a pre-alpha state, and only suitable for use by developers."

Severity Score

Related Resources (5)

https://jessie.cafe/posts/pwning-ladybirds-libjs/
https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669
https://nvd.nist.gov/vuln/detail/CVE-2025-47154
https://news.ycombinator.com/item?id=43852096
https://www.mend.io/vulnerability-database/CVE-2025-47154

Severity Score

Weakness Type (CWE)

Missing Synchronization

CWE-820

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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