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CVE-2026-53643

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the `can_always_access` module flag (which grants all staff access to certain modules) and insufficient permission checks or unsafe parameter handling on individual endpoints. Version 0.8.0 contains a fix. Some workarounds are available. Restrict staff accounts to only those
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ceb0a41b134abb269525b9da65f1ab54fa11281fbc99133ddbe0d0c3d2dbd54b
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-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"FOSSBilling","vendor":"FOSSBilling","versions":[{"status":"affected","version":"< 0.8.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/problemTypes/2/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-563q-g4r4-6f9m","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-563q-g4r4-6f9m"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc0980b1f06be1753dbdb44196417e961d489488f7fc20f4d0b75c48a8576708 · sha256:640cf28fe372c4c0… · /containers/cna/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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