How severe is CVE-2021-47906?

CVE-2021-47906 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-2021-47906 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47906?

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

Does CVE-2021-47906 have an EU (EUVD) identifier?

Yes. CVE-2021-47906 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4295.

When was CVE-2021-47906 published?

CVE-2021-47906 was published on 2026-01-23 and last updated on 2026-06-17.

CVE-2021-47906

CVE-2021-47906 is a medium-severity vulnerability 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% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4295
Weakness: CWE-79
Published: 2026-01-23
Last modified: 2026-06-17

Description

BloofoxCMS 0.5.2.1 contains a stored cross-site scripting vulnerability in the articles text parameter that allows authenticated attackers to inject malicious scripts. Attackers can insert malicious javascript payloads in the text field to execute scripts and potentially steal authenticated users' cookies.

Frequently asked questions

What is CVE-2021-47906?: BloofoxCMS 0.5.2.1 contains a stored cross-site scripting vulnerability in the articles text parameter that allows authenticated attackers to inject malicious scripts. Attackers can insert malicious javascript payloads in the text field to execute scripts and potentially steal authenticated users' cookies.
How severe is CVE-2021-47906?: CVE-2021-47906 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-2021-47906 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-47906?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47906 have an EU (EUVD) identifier?: Yes. CVE-2021-47906 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4295.
When was CVE-2021-47906 published?: CVE-2021-47906 was published on 2026-01-23 and last updated on 2026-06-17.

References

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

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CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
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CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

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