CVE-2026-53640

LOW

FOSSBilling missing authorization checks on read-only admin API endpoints expose sensitive staff, client, and redirect data

Title source: cna
STIX 2.1

Description

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, low-privileged staff accounts may read sensitive data via admin API endpoints that lack permission checks. While sibling write endpoints correctly enforce fine-grained permissions, the corresponding read endpoints have no authorization guards. Version 0.8.0 contains a fix. Some workarounds are available. Restrict staff accounts to only those who need access to sensitive data and/or use a reverse proxy or WAF to restrict access to the affected endpoints.

References (1)

Core 1
Core References

Scores

CVSS v4 2.3
EPSS 0.0023
EPSS Percentile 13.3%
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200 CWE-862
Status published
Products (1)
FOSSBilling/FOSSBilling < 0.8.0
Published Jul 06, 2026
Tracked Since Jul 07, 2026