How severe is CVE-2020-8789?

CVE-2020-8789 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-8789 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8789?

CVE-2020-8789 affects Composr Project Composr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8789?

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

When was CVE-2020-8789 published?

CVE-2020-8789 was published on 2020-05-22 and last updated on 2026-06-17.

CVE-2020-8789

CVE-2020-8789 is a medium-severity vulnerability in Composr Project Composr with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Composr Project Composr
Published: 2020-05-22
Last modified: 2026-06-17

Description

Composr 10.0.30 allows Persistent XSS via a Usergroup name under the Security configuration.

Frequently asked questions

What is CVE-2020-8789?: Composr 10.0.30 allows Persistent XSS via a Usergroup name under the Security configuration.
How severe is CVE-2020-8789?: CVE-2020-8789 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-8789 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8789?: CVE-2020-8789 affects Composr Project Composr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8789?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8789 published?: CVE-2020-8789 was published on 2020-05-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:composr_project:composr:*:*:*:*:*:*:*:*

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