How severe is CVE-2020-6583?

CVE-2020-6583 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-6583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6583?

CVE-2020-6583 affects Bigprof Online Invoicing System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-6583?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-6583 published?

CVE-2020-6583 was published on 2020-01-08 and last updated on 2026-06-17.

CVE-2020-6583

CVE-2020-6583 is a medium-severity vulnerability in Bigprof Online Invoicing System with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Bigprof Online Invoicing System
Published: 2020-01-08
Last modified: 2026-06-17

Description

BigProf Online Invoicing System (OIS) through 2.6 has XSS that can be leveraged for session hijacking. An attacker can exploit the XSS vulnerability, retrieve the session cookie from the administrator login, and take over the administrator account via the Name field in an Add New Client action.

Frequently asked questions

What is CVE-2020-6583?: BigProf Online Invoicing System (OIS) through 2.6 has XSS that can be leveraged for session hijacking. An attacker can exploit the XSS vulnerability, retrieve the session cookie from the administrator login, and take over the administrator account via the Name field in an Add New Client action.
How severe is CVE-2020-6583?: CVE-2020-6583 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-6583 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6583?: CVE-2020-6583 affects Bigprof Online Invoicing System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-6583?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-6583 published?: CVE-2020-6583 was published on 2020-01-08 and last updated on 2026-06-17.

References

https://www.sevenlayers.com/index.php/282-online-invoicing-system-2-6-xss-session-hijack

Affected products (1)

cpe:2.3:a:bigprof:online_invoicing_system:*:*:*:*:*:*:*:*

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