Medium severity4.4NVD Advisory· Published Mar 3, 2021· Updated Jun 17, 2026
CVE-2021-27839
CVE-2021-27839
Description
A CSV injection vulnerability found in Online Invoicing System (OIS) 4.3 and below can be exploited by users to perform malicious actions such as redirecting admins to unknown or harmful websites, or disclosing other clients' details that the user did not have access to.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:bigprof:online_invoicing_system:*:*:*:*:*:*:*:*Range: <=4.3
- Online Invoicing System/Online Invoicing Systemdescription
- Range: <=4.3
Patches
Vulnerability mechanics
References
2- github.com/bigprof-software/online-invoicing-system/releases/tag/4.4nvdRelease NotesThird Party Advisory
- www.jinsonvarghese.com/csv-injection-in-online-invoicing-system/nvdThird Party Advisory
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