CWE-539: CWE-539

Total CVEs

Critical

High

5.3

Avg CVSS

Yearly Trend

2026

2023

Top Affected Vendors

1 Hcltech 1

2 Palletsprojects 1

All CWE-539 CVEs (2)

CVE-2023-30861

7.5

This vulnerability in Flask allows session cookie leakage when specific conditions are met with caching proxies. It affects Flask applications hosted ...

May 2, 2023

CVE-2025-52633

3.1

HCL AION stores sensitive session information in persistent cookies that survive browser sessions, potentially allowing attackers to hijack user sessi...

Feb 3, 2026

About CWE-539 (CWE-539)

Our database tracks 2 CVEs classified as CWE-539, with 0 rated critical and 1 rated high severity. The average CVSS score for CWE-539 vulnerabilities is 5.3.

External reference: View CWE-539 on MITRE CWE →

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