What’s Vulnerable › Vulnerabilities

CVE-2021-46900

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-31 · updated 2026-06-17
• Weakness: CWE-327

Description

Sympa before 6.2.62 relies on a cookie parameter for certain security objectives, but does not ensure that this parameter exists and has an unpredictable value. Specifically, the cookie parameter is both a salt for stored passwords and an XSS protection mechanism.

Affected products

• Sympa: before 6.2.62 — fixed in 6.2.62

How to fix

Upgrade to a fixed version: Sympa 6.2.62. Check the vendor advisory for mitigations.

References

• https://github.com/sympa-community/sympa-community.github.io/blob/master/security/2021-001.md
• https://github.com/sympa-community/sympa/issues/1091
• https://www.sympa.community/security/2021-001.html
• https://github.com/sympa-community/sympa-community.github.io/blob/master/security/2021-001.md
• https://github.com/sympa-community/sympa/issues/1091
• https://www.sympa.community/security/2021-001.html

Get alerted when CVE-2021-46900 or the next vulnerability affects your stack