CVE-2026-57380 hupe13 CVE debrief

Who should care

Users of Extensions for Leaflet Map, particularly those using versions up to 5.1, should be aware of this vulnerability. This includes website administrators, developers, and security teams who are responsible for maintaining and securing their online presence. Given the high CVSS score of 7.1, indicating a high severity, it is crucial to take necessary precautions to prevent exploitation. This includes updating Extensions for Leaflet Map to a version beyond 5.1, implementing input validation and sanitization for user-generated content, and using a web application firewall to detect and prevent XSS attacks.

Technical summary

The vulnerability is caused by improper neutralization of input during web page generation, allowing for DOM-Based XSS attacks. The CVSS score is 7.1, indicating a high severity. This issue affects Extensions for Leaflet Map from n/a through <= 5.1. The vulnerability can be exploited by injecting malicious code into the web page, potentially leading to unauthorized access or data theft. To prevent exploitation, it is essential to update Extensions for Leaflet Map to a version beyond 5.1 and implement input validation and sanitization for user-generated content. Additionally, using a web application firewall can help detect and prevent XSS attacks.

Defensive priority

High priority should be given to updating Extensions for Leaflet Map to a version beyond 5.1 and implementing input validation and sanitization for user-generated content. Additionally, using a web application firewall can help detect and prevent XSS attacks.

Recommended defensive actions

• Update Extensions for Leaflet Map to a version beyond 5.1
• Implement input validation and sanitization for user-generated content
• Use a web application firewall to detect and prevent XSS attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is needed to fully understand the impact and affected scope. The vulnerability is caused by improper neutralization of input during web page generation, allowing for DOM-Based XSS attacks. Users of Extensions for Leaflet Map, particularly those using versions up to 5.1, should be aware of this vulnerability. Given the high CVSS score of 7.1, indicating a high severity, it is crucial to verify the affected product deployments in managed environments. The official CVE record and NVD entry should be reviewed to validate affected scope, severity, and vendor guidance.

Official resources