CVE Explorer

CVE-2026-42341

FOSSBilling is a free, open-source billing and client management system. Versions 0.6.0 through 0.7.2 have an unauthenticated payment bypass vulnerability in FOSSBilling's IPN callback endpoint. When the Custom payment adapter is enabled, an attacker can mark any unpaid invoice as paid and credit the associated client account without making an actual payment, by sending a single crafted HTTP request. Version 0.8.0 patches the issue. Some workarounds are available. Disable the Custom payment gate

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:38ceef9e13dbe600ea13e541d8131e586d3cc738bc82773fa0d25f2ccf59114c

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"FOSSBilling","vendor":"FOSSBilling","versions":[{"status":"affected","version":">= 0.6.0, < 0.8.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-5493-9m76-2qrr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-5493-9m76-2qrr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:aebb13ec70b846133eab35ce6b2f69fa67da13c55fac9e759621a889033bc44b · sha256:3339f0df2b9b0d58… · /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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