Security readout for executives and security teams
Plain-English summary
A Perl JWT library used to validate security tokens could let an attacker bypass authentication if an application trusts affected token handling. The issue affects perl-CRYPT-JWT 0.022 and earlier and is fixed in 0.023.
Executive priority
Treat as priority remediation where the library protects application login, API access, or session trust. Business risk depends on whether affected versions are deployed in authentication paths.
Technical view
Crypt::JWT 0.022 and earlier reportedly has incorrect access control in JWT.pm, _decode_jws(), around line 614. The stated impact is authentication bypass via crafted user-controlled network input. The source bundle provides no CVSS score or CWE.
Likely exposure
Exposure is most likely in Perl applications using perl-CRYPT-JWT 0.022 or earlier to validate JWT/JWS tokens for authentication or authorization on reachable services.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. It states a network attack vector involving crafted user-controlled input, but does not provide broader exploitation telemetry.
Researcher notes
Evidence is sparse: the CVE names the component, affected versions, impact, attack vector, and fixed version, but lacks CVSS, CWE, and detailed technical analysis in the supplied bundle.
Mitigation direction
- Upgrade perl-CRYPT-JWT to version 0.023 or later.
- Identify services that rely on Crypt::JWT for authentication decisions.
- Review vendor or maintainer guidance for any additional recommended changes.
- Prioritize internet-facing or partner-facing authentication paths first.
Validation and detection
- Inventory deployed Perl dependencies for Crypt::JWT versions 0.022 or earlier.
- Confirm JWT validation paths use the upgraded library version.
- Check authentication services for direct or transitive perl-CRYPT-JWT usage.
- Review logs for unusual token validation failures or anomalous authentication outcomes.
Public sources used
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.
Credential 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-2019-1010161 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://github.com/DCIT/perl-Crypt-JWT/issues/3#issuecomment-417947483CVE 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.