Security readout for executives and security teams
Plain-English summary
Applications using vulnerable bubble-fireworks could accept forged JSON Web Tokens because signatures were not properly checked. If the package is used for authentication or authorization decisions, attackers may be able to make the application trust claims they did not legitimately receive.
Executive priority
Prioritize remediation for any production system where bubble-fireworks protects user identity, authorization, or privileged workflows. Lower priority applies only where the package is present but not used for JWT trust decisions.
Technical view
CVE-2021-29500 is a CWE-347 improper signature verification flaw in fxbin bubble-fireworks before 2021.BUILD-SNAPSHOT. The CVSS 3.1 score is 7.5 with network attack vector, low complexity, no privileges, no user interaction, and high integrity impact.
Likely exposure
Exposure is limited to applications that include fxbin bubble-fireworks versions earlier than 2021.BUILD-SNAPSHOT and rely on its JWT handling for authorization or trust decisions. Internet exposure depends on whether those JWT-protected endpoints are reachable.
Exploitation context
The source bundle does not cite active exploitation, public exploit code, or CISA KEV inclusion. The issue is important because unauthenticated network attackers could potentially forge trusted JWTs, affecting application integrity.
Researcher notes
The record identifies missing JWT signature validation, not a broader Spring Framework flaw. The available sources do not provide deeper code context, affected API names, exploit telemetry, or compensating controls beyond the fixed version boundary.
Mitigation direction
- Upgrade bubble-fireworks to 2021.BUILD-SNAPSHOT or later where available.
- Check the GitHub advisory and vendor guidance for current remediation instructions.
- Review applications that delegate JWT trust decisions to this package.
- Add regression tests ensuring invalidly signed JWTs are rejected.
Validation and detection
- Inventory dependency manifests and lockfiles for fxbin bubble-fireworks.
- Confirm deployed versions are not earlier than 2021.BUILD-SNAPSHOT.
- Identify routes or services where bubble-fireworks validates JWTs.
- Run safe authentication tests proving bad signatures are denied.
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.
CWE-347: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-29500 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:N/I:H/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:N/I:H/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:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/fxbin/bubble-fireworks/security/advisories/GHSA-hj36-84cp-29prCVE reference · x_refsource_CONFIRM
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.
Improper Verification of Cryptographic Signature
Improper Verification of Cryptographic Signature represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.