CVE-2021-31923
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
- Record
CVE-2021-31923- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-444
- Updated
- 2026-11-02
CVE List No score
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
- Record
CVE-2021-31923- Updated
- 2026-11-02
EUVDEUVD-2021-18796 No score
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
- Record
EUVD-2021-18796- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ph7p-h447-h4q6 No score
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.
- Record
GHSA-ph7p-h447-h4q6- Weakness
- CWE-444
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31923 is a medium vulnerability (CVSS 5.3) in Ping Identity Pingaccess, published September 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. No source names a fixed version.