Security readout for executives and security teams
Apache CXF could be abused to make an OAuth authorization server fetch attacker-supplied HTTPS request_uri values. That creates denial-of-service risk against the authorization service. The public bundle says affected CXF versions are before 3.4.3 and before 3.3.10. Exposure is most likely where Apache CXF runs an OAuth 2 authorization service using JwtRequestCodeFilter or JAR request_uri support on vulnerable versions. Systems not using CXF for OAuth authorization, or not accepting request_uri, have less evident exposure from the provided sources. Prioritize remediation for internet-facing or partner-facing OAuth authorization services using Apache CXF. Business risk is service availability disruption, not confirmed data compromise from the provided sources. Treat as a focused dependency and configuration review rather than an emergency unless critical identity services are exposed. Mitigation focus: Upgrade Apache CXF to 3.4.3 or later where applicable.; Upgrade Apache CXF 3.3.x deployments to 3.3.10 or later.; Check Apache CXF advisory guidance for branch-specific remediation details..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
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Open ATT&CK lookupCWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-22696 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://cxf.apache.org/security-advisories.data/CVE-2021-22696.txt.ascCVE reference · x_refsource_MISC
- [cxf-dev] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacksCVE reference · mailing-list, x_refsource_MLIST
- [cxf-users] 20210402 CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacksCVE reference · mailing-list, x_refsource_MLIST
- [cxf-commits] 20210402 svn commit: r1073270 - in /websites/production/cxf/content: cache/main.pageCache security-advisories.data/CVE-2021-22696.txt.asc security-advisories.htmlCVE reference · mailing-list, x_refsource_MLIST
- [announce] 20210402 [Apache CXF] CVE-2021-22696: OAuth 2 authorization service vulnerable to DDos attacksCVE reference · mailing-list, x_refsource_MLIST
- [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.htmlCVE reference · mailing-list, x_refsource_MLIST
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.