How severe is CVE-2021-47905?

CVE-2021-47905 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-2021-47905 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47905?

CVE-2021-47905 affects Mybb Delete Account. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47905?

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

Does CVE-2021-47905 have an EU (EUVD) identifier?

Yes. CVE-2021-47905 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4276.

When was CVE-2021-47905 published?

CVE-2021-47905 was published on 2026-01-23 and last updated on 2026-06-17.

CVE-2021-47905

CVE-2021-47905 is a medium-severity vulnerability in Mybb Delete Account 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 v4: 5.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4276
Weakness: CWE-79
Affected product: Mybb Delete Account
Published: 2026-01-23
Last modified: 2026-06-17

Description

MyBB Delete Account Plugin 1.4 contains a cross-site scripting vulnerability in the account deletion reason input field. Attackers can inject malicious scripts that will execute in the admin interface when viewing delete account reasons.

Frequently asked questions

What is CVE-2021-47905?: MyBB Delete Account Plugin 1.4 contains a cross-site scripting vulnerability in the account deletion reason input field. Attackers can inject malicious scripts that will execute in the admin interface when viewing delete account reasons.
How severe is CVE-2021-47905?: CVE-2021-47905 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-2021-47905 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47905?: CVE-2021-47905 affects Mybb Delete Account. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47905 have an EU (EUVD) identifier?: Yes. CVE-2021-47905 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4276.
When was CVE-2021-47905 published?: CVE-2021-47905 was published on 2026-01-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mybb:delete_account:1.4:*:*:*:*:mybb:*:*

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