How severe is CVE-2020-22839?

CVE-2020-22839 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-2020-22839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-22839?

CVE-2020-22839 affects B2evolution B2evolution Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-22839?

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

When was CVE-2020-22839 published?

CVE-2020-22839 was published on 2021-02-09 and last updated on 2026-06-17.

CVE-2020-22839

CVE-2020-22839 is a medium-severity vulnerability in B2evolution B2evolution Cms 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: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: B2evolution B2evolution Cms
Published: 2021-02-09
Last modified: 2026-06-17

Description

Reflected cross-site scripting vulnerability (XSS) in the evoadm.php file in b2evolution cms version 6.11.6-stable allows remote attackers to inject arbitrary webscript or HTML code via the tab3 parameter.

Frequently asked questions

What is CVE-2020-22839?: Reflected cross-site scripting vulnerability (XSS) in the evoadm.php file in b2evolution cms version 6.11.6-stable allows remote attackers to inject arbitrary webscript or HTML code via the tab3 parameter.
How severe is CVE-2020-22839?: CVE-2020-22839 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-2020-22839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-22839?: CVE-2020-22839 affects B2evolution B2evolution Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-22839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-22839 published?: CVE-2020-22839 was published on 2021-02-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:b2evolution:b2evolution_cms:6.11.6:*:*:*:*:*:*:*

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