What’s Vulnerable › Vulnerabilities

CVE-2020-35676

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-24 · updated 2026-06-17
• Weakness: CWE-79

Description

BigProf Online Invoicing System before 3.1 fails to correctly sanitize an XSS payload when a user registers using the self-registration functionality. As such, an attacker can input a crafted payload that will execute upon the application's administrator browsing the registered users' list. Once the arbitrary Javascript is executed in the context of the admin, this will cause the attacker to gain administrative privileges, effectively leading into an application takeover. This affects app/membership_signup.php and app/admin/pageViewMembers.php.

Affected products

• BigProf Online Inventory Manager: before 3.1 — fixed in 3.1

How to fix

Upgrade to a fixed version: BigProf Online Inventory Manager 3.1. Check the vendor advisory for mitigations.

References

• https://github.com/bigprof-software/online-invoicing-system/releases/tag/3.1
• https://labs.ingredous.com/2020/07/13/ois-membershipsignup-xss/
• https://github.com/bigprof-software/online-invoicing-system/releases/tag/3.1
• https://labs.ingredous.com/2020/07/13/ois-membershipsignup-xss/

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