CVE-2026-53641 Details
Description
FOSSBilling is a free, open-source billing and client management system. Versions 0.6.0 through 0.7.2 have a stored cross-site scripting (XSS) vulnerability in the client-facing email history views of FOSSBilling. Email HTML content (`content_html`) is rendered into a JavaScript template literal using the `|raw` filter, bypassing all output escaping. An attacker with admin access can inject malicious JavaScript payloads into email content that execute in the browser of any client who views their email history. Version 0.8.0 contains a fix. Some workarounds are available. Restrict admin account access, audit email content in the database for suspicious payloads, and/or monitor client accounts for unusual activity.
A stored cross-site scripting vulnerability has been identified in FOSSBilling versions 0.6.0 prior to 0.7.2. This issue arises in the client-facing email history views, where email HTML content is rendered into a JavaScript template literal using the raw filter, bypassing output escaping. An attacker with admin access can inject malicious JavaScript into the email content, which executes in the browser of any client who views their email history. FOSSBilling version 0.8.0 addresses this vulnerability.
Users can update to FOSSBilling version 0.8.0, restrict admin account access, audit email content in the database for suspicious payloads, and monitor client accounts for unusual activity.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 6, 2026CISA-ADP
Assessed Jul 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-q6c8-6r72-35f7 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
| CWE-838 | Inappropriate Encoding for Output Context | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| FOSSBilling | >= 0.6.0, <= 0.7.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 8, 2026 | CVE Modified | CISA-ADP |
| Jul 6, 2026 | New CVE Received | [email protected] |