How severe is CVE-2021-36884?

CVE-2021-36884 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-36884 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36884?

CVE-2021-36884 affects Backupbliss Backup Migration. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36884?

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

When was CVE-2021-36884 published?

CVE-2021-36884 was published on 2021-11-19 and last updated on 2026-06-17.

CVE-2021-36884

CVE-2021-36884 is a medium-severity vulnerability in Backupbliss Backup Migration with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Backupbliss Backup Migration
Published: 2021-11-19
Last modified: 2026-06-17

Description

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability discovered in WordPress Backup Migration plugin <= 1.1.5 versions.

Frequently asked questions

What is CVE-2021-36884?: Authenticated Persistent Cross-Site Scripting (XSS) vulnerability discovered in WordPress Backup Migration plugin <= 1.1.5 versions.
How severe is CVE-2021-36884?: CVE-2021-36884 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-36884 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36884?: CVE-2021-36884 affects Backupbliss Backup Migration. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36884?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36884 published?: CVE-2021-36884 was published on 2021-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:backupbliss:backup_migration:*:*:*:*:*:wordpress:*:*

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