CVE-2024-11831
MediumCVSS 5.4Exploitation Probability (EPSS)
Elevated risk66th percentile - higher than 66% of all known CVEs
Summary
A flaw was found in npm-serialize-javascript where the module does not properly sanitize certain inputs like regex or other JavaScript object types, allowing an attacker to inject malicious code. This code can be executed during deserialization in a web browser, leading to Cross-site scripting (XSS) attacks.
Risk Assessment
The risk for the organization is the potential execution of malicious scripts in users' browsers, which could lead to session data theft, account takeover, or website defacement. Applications that send serialized data to web clients are particularly vulnerable.
Recommendation
It is recommended to immediately update the serialize-javascript package to the latest version that includes a security fix. Also review the code for any use of unsanitized input in serialization contexts.
Other vulnerabilities in serialize-javascript
See all- CVE-2026-115897Low
Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function source text ends exactly at that prefix. Because each function body is escaped independently, a delimiter supplied by surrounding serialized output can terminate an HTML script element, and a later serialized value supplies injected markup that becomes a live element in the page. Exploitation requires control of a serialized function's source text, such as through a spoofed toString().
- CVE-2026-115754Medium
serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability. Attackers can break out of HTML script elements by ending serialized function source text with an unescaped </script.
- CVE-2026-97711Low
Serialize JavaScript from version 7.1.1 until 7.1.2 does not fully protect serialized functions against script-closing tags in attacker-influenced function source. This can cause the script element to terminate early and the remaining output to be parsed as HTML, enabling cross-site scripting in the page origin. Only function values are affected, and the issue is fixed in version 7.1.2.
Original NVD description (English source)
A flaw was found in npm-serialize-javascript. The vulnerability occurs because the serialize-javascript module does not properly sanitize certain inputs, such as regex or other JavaScript object types, allowing an attacker to inject malicious code. This code could be executed when deserialized by a web browser, causing Cross-site scripting (XSS) attacks. This issue is critical in environments where serialized data is sent to web clients, potentially compromising the security of the website or web application using this package.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS