CVE-2021-24155

HIGHNVD 7.29.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 84% probability of exploitation within the next 30 days (top 0.3% of all CVEs). NVD baseline CVSS 7.2 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Weaponized
7.2
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 84%
CISA-KEV: Not listedEPSS: 84%CVSS: 7.2Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.2
EG Score
9.0(high)
EG Risk
79(Track)
EG Risk 79/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation84% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.7%
KEV
Not listed

Published

April 5, 2021

Last Modified

November 21, 2024

References (6)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:58 UTCEG score recompute▲ 1.80
  2. 2026-07-22 22:44 UTCEG score recompute▼ 1.80
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-19 02:26 UTCEPSS rescore
  7. 2026-07-15 16:55 UTCEPSS rescore
  8. 2026-07-15 16:55 UTCEPSS rescore
  9. 2026-07-09 19:07 UTCEPSS rescore
  10. 2026-07-04 06:29 UTCEPSS rescore
  11. 2026-07-04 06:29 UTCEPSS rescore
  12. 2026-07-01 15:03 UTCEPSS rescore
  13. 2026-06-28 14:05 UTCEPSS rescore
  14. 2026-06-28 04:54 UTCEPSS rescore
  15. 2026-06-28 04:54 UTCEPSS rescore
  16. 2026-06-25 13:48 UTCEPSS rescore
  17. 2026-06-25 13:48 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-23 21:31 UTCEPSS rescore
  20. 2026-06-21 14:54 UTCEPSS rescore
  21. 2026-06-21 14:54 UTCEPSS rescore
  22. 2026-06-21 01:58 UTCEPSS rescore
  23. 2026-06-21 01:57 UTCEPSS rescore
  24. 2026-06-16 17:50 UTCEPSS rescore
  25. 2026-06-15 17:46 UTCEPSS rescore
Show 15 more
  1. 2026-06-13 22:58 UTCEPSS rescore
  2. 2026-06-10 13:20 UTCEPSS rescore
  3. 2026-06-08 14:15 UTCEPSS rescore
  4. 2026-06-08 14:15 UTCEPSS rescore
  5. 2026-06-05 22:45 UTCEPSS rescore
  6. 2026-06-05 22:45 UTCEPSS rescore
  7. 2026-05-31 00:15 UTCEPSS rescore
  8. 2026-05-31 00:15 UTCEPSS rescore
  9. 2026-05-29 13:42 UTCEPSS rescore
  10. 2026-05-28 13:43 UTCEPSS rescore
  11. 2026-05-28 13:43 UTCEPSS rescore
  12. 2026-05-27 13:39 UTCEPSS rescore
  13. 2026-05-26 18:45 UTCEG score recompute
  14. 2026-05-26 18:45 UTCGHSA enrichment
  15. 2026-05-24 16:49 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC0dayNinja/CVE-2021-24155.rb
    First seen Jul 30, 2021

    WordPress Backup Guard Authenticated Remote Code Execution Exploit

    Open source ↗
  • Exploit-DBEDB-50093
    First seen Jul 5, 2021

    Wordpress Plugin Backup Guard 1.5.8 - Remote Code Execution (Authenticated)

    Open source ↗
  • Metasploitexploit/multi/http/wp_plugin_backup_guard_rce✓ verified
    First seen May 4, 2021

    Wordpress Plugin Backup Guard - Authenticated Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-24155.yaml
    First seen Jan 1, 2021

    WordPress BackupGuard <1.6.0 - Authenticated Arbitrary File Upload

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-24155?
CVE-2021-24155 is a high vulnerability published on April 5, 2021. 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.
When was CVE-2021-24155 disclosed?
CVE-2021-24155 was first published in the National Vulnerability Database on April 5, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-24155 actively exploited?
CVE-2021-24155 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-24155?
CVE-2021-24155 has a CVSS v3 base score of 7.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2021-24155?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-24155, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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