How severe is CVE-2021-47783?

CVE-2021-47783 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-2021-47783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47783?

CVE-2021-47783 affects Phpwcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47783?

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

Does CVE-2021-47783 have an EU (EUVD) identifier?

Yes. CVE-2021-47783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3009.

When was CVE-2021-47783 published?

CVE-2021-47783 was published on 2026-01-16 and last updated on 2026-06-17.

CVE-2021-47783

CVE-2021-47783 is a medium-severity vulnerability in Phpwcms 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-434.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3009
Weakness: CWE-434
Affected product: Phpwcms
Published: 2026-01-16
Last modified: 2026-06-17

Description

Phpwcms 1.9.30 contains a file upload vulnerability that allows authenticated attackers to upload malicious SVG files with embedded JavaScript. Attackers can upload crafted SVG payloads through the multiple file upload feature to potentially execute cross-site scripting attacks on the platform.

Frequently asked questions

What is CVE-2021-47783?: Phpwcms 1.9.30 contains a file upload vulnerability that allows authenticated attackers to upload malicious SVG files with embedded JavaScript. Attackers can upload crafted SVG payloads through the multiple file upload feature to potentially execute cross-site scripting attacks on the platform.
How severe is CVE-2021-47783?: CVE-2021-47783 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-2021-47783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47783?: CVE-2021-47783 affects Phpwcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47783?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47783 have an EU (EUVD) identifier?: Yes. CVE-2021-47783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3009.
When was CVE-2021-47783 published?: CVE-2021-47783 was published on 2026-01-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpwcms:phpwcms:1.9.30:*:*:*:*:*:*:*

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