How severe is CVE-2021-28280?

CVE-2021-28280 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-2021-28280 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28280?

CVE-2021-28280 affects Php-fusion Phpfusion. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28280?

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

When was CVE-2021-28280 published?

CVE-2021-28280 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2021-28280

CVE-2021-28280 is a medium-severity vulnerability in Php-fusion Phpfusion 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% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Php-fusion Phpfusion
Published: 2021-04-29
Last modified: 2026-06-17

Description

CSRF + Cross-site scripting (XSS) vulnerability in search.php in PHPFusion 9.03.110 allows remote attackers to inject arbitrary web script or HTML

Frequently asked questions

What is CVE-2021-28280?: CSRF + Cross-site scripting (XSS) vulnerability in search.php in PHPFusion 9.03.110 allows remote attackers to inject arbitrary web script or HTML
How severe is CVE-2021-28280?: CVE-2021-28280 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-2021-28280 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28280?: CVE-2021-28280 affects Php-fusion Phpfusion. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28280?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28280 published?: CVE-2021-28280 was published on 2021-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:php-fusion:phpfusion:9.03.110:*:*:*:*:*:*:*

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