CVE-2021-22696

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

6.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 93.7% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-02 10:05Z5 YR AGO

Last updated

2025-02-13 16:27Z1 YR AGO

Reserved

2021-01-06

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-918Server-Side Request Forgery (SSRF)Base

Data version

5.1

Document digest

f1c6139b28311b8897275cfd58731972bed1faf7f251b21a52fd5d710209e90e

• cxf.apache.orghttps://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.ascx_refsource_MISC
• lists.apache.org[cxf-dev] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attackshttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cdev.cxf.apache.org%3Emailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210402 CVE-2021-22696: Apache CXF: OAuth 2 authorization service vulnerable to DDos attackshttp://www.openwall.com/lists/oss-security/2021/04/02/2mailing-listx_refsource_MLIST
• lists.apache.org[cxf-users] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attackshttps://lists.apache.org/thread.html/r8651c06212c56294a1c0ea61a5ad7790c06502209c03f05c0c7c9914%40%3Cusers.cxf.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[cxf-commits] 20210402 svn commit: r1073270 - in /websites/production/cxf/content: cache/main.pageCache security-advisories.data/CVE-2021-22696.txt.asc security-advisories.htmlhttps://lists.apache.org/thread.html/rec7160382badd3ef4ad017a22f64a266c7188b9ba71394f0d321e2d4%40%3Ccommits.cxf.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[announce] 20210402 [Apache CXF] CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attackshttps://lists.apache.org/thread.html/r6445001cc5f9a2bb1e6316993753306e054bdd1d702656b7cbe59045%40%3Cannounce.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[cxf-commits] 20210616 svn commit: r1075801 - in /websites/production/cxf/content: cache/main.pageCache index.html security-advisories.data/CVE-2021-30468.txt.asc security-advisories.htmlhttps://lists.apache.org/thread.html/rfb87e0bf3995e7d560afeed750fac9329ff5f1ad49da365129b7f89e%40%3Ccommits.cxf.apache.org%3Emailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC