Security readout for executives and security teams
Plain-English summary
This issue affects token validation in github.com/robbert229/jwt. The comparison of an HMAC can leak timing differences, which may help an attacker infer the expected HMAC after many requests over a low-latency path. The stated impact is confidentiality loss, not service outage or direct data modification.
Executive priority
Prioritize systems where this library protects sensitive sessions, API tokens, or privileged service-to-service calls. The business risk is unauthorized inference of authentication material, but the provided sources do not show active exploitation or broad product exposure.
Technical view
The vulnerable validation path performs HMAC comparison in a timing-sensitive way. The CVSS 3.1 score is 7.5, network exploitable, no privileges or user interaction required, with high confidentiality impact. The provided sources identify github.com/robbert229/jwt and reference a fixing commit, but do not name a packaged fixed version.
Likely exposure
Exposure is likely limited to Go applications importing github.com/robbert229/jwt for HMAC-signed token validation. Public API endpoints, internal services on low-latency networks, or gateways that allow repeated invalid token checks are the main concern. No CPEs or downstream products are identified in the provided data.
Exploitation context
The source bundle says exploitation requires enough requests over a low-latency connection to infer the expected HMAC. CISA KEV is false, and no provided source states active exploitation. Treat this as plausible but unconfirmed exploitation risk, especially for exposed token validation services.
Researcher notes
The strongest evidence is the CVE description, Go vulnerability entry, GitHub issue, and referenced commit. The affected-version data is sparse, listing version 0 and no CPEs. Validate exposure from source code and build artifacts rather than relying on scanner product matching alone.
Mitigation direction
- Inventory Go services for github.com/robbert229/jwt usage.
- Review vendor guidance and the referenced fixing commit before choosing remediation.
- Replace or update vulnerable dependency where a maintained safe version is available.
- Prefer token libraries that use constant-time MAC comparison.
- Add monitoring for repeated invalid token validation attempts.
Validation and detection
- Search dependency manifests and lockfiles for github.com/robbert229/jwt.
- Confirm whether running builds include the vulnerable validation code.
- Verify token validation uses constant-time HMAC comparison.
- Map exposed endpoints that validate HMAC-signed JWTs.
- Check logs for high-volume invalid token attempts from low-latency sources.
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-2015-10004 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/robbert229/jwt/commit/ca1404ee6e83fcbafb66b09ed0d543850a15b654CVE reference
- https://github.com/robbert229/jwt/issues/12CVE reference
- https://pkg.go.dev/vuln/GO-2020-0023CVE reference
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.