How severe is CVE-2020-5842?

CVE-2020-5842 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-2020-5842 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5842?

CVE-2020-5842 affects Codologic Codoforum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5842?

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

When was CVE-2020-5842 published?

CVE-2020-5842 was published on 2020-01-07 and last updated on 2026-06-17.

CVE-2020-5842

CVE-2020-5842 is a medium-severity vulnerability in Codologic Codoforum 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: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Codologic Codoforum
Published: 2020-01-07
Last modified: 2026-06-17

Description

Codoforum 4.8.3 allows XSS in the user registration page: via the username field to the index.php?u=/user/register URI. The payload is, for example, executed on the admin/index.php?page=users/manage page.

Frequently asked questions

What is CVE-2020-5842?: Codoforum 4.8.3 allows XSS in the user registration page: via the username field to the index.php?u=/user/register URI. The payload is, for example, executed on the admin/index.php?page=users/manage page.
How severe is CVE-2020-5842?: CVE-2020-5842 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-2020-5842 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5842?: CVE-2020-5842 affects Codologic Codoforum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5842?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5842 published?: CVE-2020-5842 was published on 2020-01-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:codologic:codoforum:4.8.3:*:*:*:*:*:*:*

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