How severe is CVE-2021-24155?

CVE-2021-24155 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24155 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 84% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24155?

CVE-2021-24155 affects Backup-guard Backup Guard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24155?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-24155 published?

CVE-2021-24155 was published on 2021-04-05 and last updated on 2026-06-17.

CVE-2021-24155

CVE-2021-24155 is a high-severity vulnerability in Backup-guard Backup Guard with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 84% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 84% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Backup-guard Backup Guard
Published: 2021-04-05
Last modified: 2026-06-17

Description

The WordPress Backup and Migrate Plugin – Backup Guard WordPress plugin before 1.6.0 did not ensure that the imported files are of the SGBP format and extension, allowing high privilege users (admin+) to upload arbitrary files, including PHP ones, leading to RCE.

Frequently asked questions

What is CVE-2021-24155?: The WordPress Backup and Migrate Plugin – Backup Guard WordPress plugin before 1.6.0 did not ensure that the imported files are of the SGBP format and extension, allowing high privilege users (admin+) to upload arbitrary files, including PHP ones, leading to RCE.
How severe is CVE-2021-24155?: CVE-2021-24155 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24155 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 84% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24155?: CVE-2021-24155 affects Backup-guard Backup Guard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24155?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-24155 published?: CVE-2021-24155 was published on 2021-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:backup-guard:backup_guard:*:*:*:*:*:wordpress:*:*

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