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CVE-2025-66565

Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID "00000000-0000-0000-0000-000000000000". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e1a2f2b3a787a35b7c2a233f577bb4f1a4a3ba2686a572eb5bded45b2df1e0a0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-338","description":"CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-252","description":"CWE-252: Unchecked Return Value","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-331","description":"CWE-331: Insufficient Entropy","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"utils","vendor":"gofiber","versions":[{"status":"affected","version":"github.com/gofiber/utils <= 1.2.0"},{"status":"affected","version":"github.com/gofiber/utils/v2 < 2.0.0-rc.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-338","description":"CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-252","description":"CWE-252: Unchecked Return Value","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-331","description":"CWE-331: Insufficient Entropy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/references/1
{"name":"https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c9ac1210e918fe68150ff03acc74062dbde760f2fabd708f37591a2955f4cc46 · sha256:59de1a48a1660506… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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