What’s Vulnerable › Vulnerabilities

CVE-2023-3521: Cross-site Scripting (XSS) - Reflected in fossbilling/fossbilling

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-07-06 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross-site Scripting (XSS) - Reflected in GitHub repository fossbilling/fossbilling prior to 0.5.4.

Affected products

• FOSSBilling: before 0.5.4 — fixed in 0.5.4

How to fix

Upgrade to a fixed version: FOSSBilling 0.5.4. Check the vendor advisory for mitigations.

References

• https://github.com/fossbilling/fossbilling/commit/5eb516d4ebcb764db1b2edf9c8d0539e76ebde52
• https://huntr.dev/bounties/76a3441d-7f75-4a8d-a7a0-95a7f5456eb0
• https://github.com/fossbilling/fossbilling/commit/5eb516d4ebcb764db1b2edf9c8d0539e76ebde52
• https://huntr.dev/bounties/76a3441d-7f75-4a8d-a7a0-95a7f5456eb0

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