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Public proof of conceptFix available

CVE-2021-24155

A public proof of concept exists; no exploitation attested.

  • Published2021-04-05
  • Fixed in1.6.0
  • WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-04-0519:15CVE publishedNVD
  2. 2021-07-05Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-04 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-24155?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-24155?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Backup-guard backup guard
BranchAffectedFixed in
1.6< 1.6.01.6.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Backup-guard backup guard to 1.6.0

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-50093
Exploit-DB
Proof-of-concept repositories
1 repository, unverified0dayNinja/CVE-2021-24155.rb
PoC-in-GitHub
Metasploit modules
1 moduleexploit/multi/http/wp_plugin_backup_guard_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2021-04-05
Last Modified
2026-06-17
NVD status
Modified

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.

Is CVE-2021-24155 actively exploited?

Active exploitation of CVE-2021-24155 has not been confirmed. Its EPSS score was 84.1% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-24155?

CVE-2021-24155 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record