How severe is CVE-2021-47917?

CVE-2021-47917 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-47917 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47917?

CVE-2021-47917 affects Simplephpscripts Simple Cms Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47917?

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

Does CVE-2021-47917 have an EU (EUVD) identifier?

Yes. CVE-2021-47917 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34754.

When was CVE-2021-47917 published?

CVE-2021-47917 was published on 2026-02-01 and last updated on 2026-06-17.

CVE-2021-47917

CVE-2021-47917 is a medium-severity vulnerability in Simplephpscripts Simple Cms Php with a CVSS 3.x base score of 6.4. 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 6.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34754
Weakness: CWE-79
Affected product: Simplephpscripts Simple Cms Php
Published: 2026-02-01
Last modified: 2026-06-17

Description

Simple CMS 2.1 contains a persistent cross-site scripting vulnerability in user input parameters that allows remote attackers to inject malicious script code. Attackers can exploit the newUser and editUser modules to inject persistent scripts that execute on user list preview, potentially leading to session hijacking and application manipulation.

Frequently asked questions

What is CVE-2021-47917?: Simple CMS 2.1 contains a persistent cross-site scripting vulnerability in user input parameters that allows remote attackers to inject malicious script code. Attackers can exploit the newUser and editUser modules to inject persistent scripts that execute on user list preview, potentially leading to session hijacking and application manipulation.
How severe is CVE-2021-47917?: CVE-2021-47917 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-47917 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47917?: CVE-2021-47917 affects Simplephpscripts Simple Cms Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47917?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47917 have an EU (EUVD) identifier?: Yes. CVE-2021-47917 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34754.
When was CVE-2021-47917 published?: CVE-2021-47917 was published on 2026-02-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:simplephpscripts:simple_cms_php:2.1:*:*:*:*:*:*:*

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