How severe is CVE-2020-35677?

CVE-2020-35677 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-35677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35677?

CVE-2020-35677 affects Bigprof Online Invoicing System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35677?

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

When was CVE-2020-35677 published?

CVE-2020-35677 was published on 2020-12-24 and last updated on 2026-06-17.

CVE-2020-35677

CVE-2020-35677 is a medium-severity vulnerability in Bigprof Online Invoicing System with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Bigprof Online Invoicing System
Published: 2020-12-24
Last modified: 2026-06-17

Description

BigProf Online Invoicing System before 4.0 fails to adequately sanitize fields for HTML characters upon an administrator using admin/pageEditGroup.php to create a new group, resulting in Stored XSS. The caveat here is that an attacker would need administrative privileges in order to create the payload. One might think this completely mitigates the privilege-escalation impact as there is only one high-privileged role. However, it was discovered that the endpoint responsible for creating the group lacks CSRF protection.

Frequently asked questions

What is CVE-2020-35677?: BigProf Online Invoicing System before 4.0 fails to adequately sanitize fields for HTML characters upon an administrator using admin/pageEditGroup.php to create a new group, resulting in Stored XSS. The caveat here is that an attacker would need administrative privileges in order to create the payload. One might think this completely mitigates the privilege-escalation impact as there is only one high-privileged role. However, it was discovered that the endpoint responsible for creating the group lacks CSRF protection.
How severe is CVE-2020-35677?: CVE-2020-35677 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-35677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35677?: CVE-2020-35677 affects Bigprof Online Invoicing System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35677?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35677 published?: CVE-2020-35677 was published on 2020-12-24 and last updated on 2026-06-17.

References

https://labs.ingredous.com/2020/07/13/ois-groupedit-xss/

Affected products (1)

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

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