What’s Vulnerable › Vulnerabilities
CVE-2021-21260: XSS in description field
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-01-22 · updated 2026-06-17
- Weakness: CWE-79
Description
Online Invoicing System (OIS) is open source software which is a lean invoicing system for small businesses, consultants and freelancers created using AppGini. In OIS version 4.0 there is a stored XSS which can enables an attacker takeover of the admin account through a payload that extracts a csrf token and sends a request to change password. It has been found that Item description is reflected without sanitization in app/items_view.php which enables the malicious scenario.
Affected products
References
- https://github.com/bigprof-software/online-invoicing-system/releases/tag/4.2
- https://github.com/bigprof-software/online-invoicing-system/security/advisories/GHSA-rm79-5596-r7q4
- https://github.com/bigprof-software/online-invoicing-system/releases/tag/4.2
- https://github.com/bigprof-software/online-invoicing-system/security/advisories/GHSA-rm79-5596-r7q4
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