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CVE-2026-27604

FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version 0.8.0, an authorization bypass in the API role handling allows unauthenticated access to privileged `/api/system/*` endpoints. Because `system` resolves to the cron admin identity, attackers can invoke admin API methods without valid credentials, session, or CSRF token. Version 0.8.0 patches the issue. Some workarounds are available. Block external access to `/api/system/*` at
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c2c8107aa0f5f6653ed6c251a08a55f158bec8bc061e34ffe23fd83a09cdcf9f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 4 assertions

{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/3/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:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /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:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/2/descriptions/0

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"FOSSBilling","vendor":"FOSSBilling","versions":[{"status":"affected","version":">= 0.5.4, < 0.8.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":10,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

4 source assertions
{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/3/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:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /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:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-57mv-jm88-66jc","tags":["x_refsource_MISC"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-57mv-jm88-66jc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/references/1
{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-78x5-c8gw-8279","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-78x5-c8gw-8279"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/references/0
{"name":"https://www.vulncheck.com/blog/fossbilling-auth-bypass-ssti-rce","tags":["x_refsource_MISC"],"url":"https://www.vulncheck.com/blog/fossbilling-auth-bypass-ssti-rce"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:01a9d342be66b1405bf0ad13dd28792e4041d19d5d5d763aa284d73687ecc854 · sha256:aaf55e18d06cd873… · /containers/cna/references/2

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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