What’s Vulnerable › Vulnerabilities

CVE-2021-31923

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-24 · updated 2026-06-17
• Weakness: CWE-444

Description

Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.

Affected products

• Ping Identity PingAccess: before 5.3.3 — fixed in 5.3.3

How to fix

Upgrade to a fixed version: Ping Identity PingAccess 5.3.3. Check the vendor advisory for mitigations.

References

• https://docs.pingidentity.com/bundle/pingaccess-53/page/wco1629833104567.html
• https://docs.pingidentity.com/bundle/pingaccess-53/page/wco1629833104567.html

Get alerted when CVE-2021-31923 or the next vulnerability affects your stack