CVE-2021-47979
CVE-2021-47979 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-22.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2021-34834
- Weakness: CWE-22
- Published:
- Last modified:
Description
WordPress Plugin Backup and Restore 1.0.3 contains an arbitrary file deletion vulnerability that allows authenticated attackers to delete files by manipulating parameters in AJAX requests. Attackers can send POST requests to admin-ajax.php with crafted file_name and folder_name parameters to delete arbitrary files from the WordPress installation directory.
Frequently asked questions
- What is CVE-2021-47979?
- WordPress Plugin Backup and Restore 1.0.3 contains an arbitrary file deletion vulnerability that allows authenticated attackers to delete files by manipulating parameters in AJAX requests. Attackers can send POST requests to admin-ajax.php with crafted file_name and folder_name parameters to delete arbitrary files from the WordPress installation directory.
- How severe is CVE-2021-47979?
- CVE-2021-47979 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-47979 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2021-47979?
- 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.
- Does CVE-2021-47979 have an EU (EUVD) identifier?
- Yes. CVE-2021-47979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34834.
- When was CVE-2021-47979 published?
- CVE-2021-47979 was published on 2026-05-16 and last updated on 2026-06-17.
References
- https://wordpress.org/plugins/backup-and-restore-for-wp/
- https://www.exploit-db.com/exploits/50503
- https://www.miniorange.com/
- https://www.vulncheck.com/advisories/wordpress-plugin-backup-and-restore-arbitrary-file-deletion
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