CVE Explorer
CVE-2026-28496
FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 have a Server-Side Template Injection (SSTI) vulnerability in the template rendering system. Administrators with access to features that render Twig templates (email templates, mass mail campaigns, custom payment adapters, and the `string_render` API endpoint) can inject arbitrary Twig expressions, leading to information disclosure and remote code execution. The vulnerability exists because Twig temp
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"FOSSBilling","vendor":"FOSSBilling","versions":[{"status":"affected","version":"< 0.8.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"HIGH","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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_v5cvssurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-1336","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-57mv-jm88-66jc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-57mv-jm88-66jc"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /containers/cna/references/0
{"name":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-78x5-c8gw-8279","tags":["x_refsource_MISC"],"url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-78x5-c8gw-8279"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /containers/cna/references/1
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:5f199f977ee21013fad45bbe84b0d9b4da1f9b5652c5d0ee4ca12496bd30bbc8 · sha256:00636f0b4e889adb… · /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.