CVE-2021-39327

MEDIUMNVD 5.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 91% probability of exploitation within the next 30 days (top 0.4% of all CVEs). NVD baseline CVSS 5.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
5.3
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 72%
CISA-KEV: Not listedEPSS: 72%CVSS: 5.3Exploit: NoneExposed: 0

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

The BulletProof Security WordPress plugin is vulnerable to sensitive information disclosure due to a file path disclosure in the publicly accessible ~/db_backup_log.txt file which grants attackers the full path of the site, in addition to the path of database backup files. This affects versions up to, and including, 5.1.

CVSS v3
5.3
EG Score
9.0(high)
EPSS
99.4%
KEV
Not listed

Published

September 17, 2021

Last Modified

November 21, 2024

References (10)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 28× 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. 2026-07-11 08:25 UTCEPSS rescore
  2. 2026-07-11 08:25 UTCEPSS rescore
  3. 2026-07-09 19:07 UTCEPSS rescore
  4. 2026-07-05 02:28 UTCEPSS rescore
  5. 2026-07-05 02:28 UTCEPSS rescore
  6. 2026-07-04 06:29 UTCEPSS rescore
  7. 2026-07-04 06:29 UTCEPSS rescore
  8. 2026-07-01 15:04 UTCEPSS rescore
  9. 2026-06-28 04:54 UTCEPSS rescore
  10. 2026-06-28 04:54 UTCEPSS rescore
  11. 2026-06-25 13:48 UTCEPSS rescore
  12. 2026-06-25 13:48 UTCEPSS rescore
  13. 2026-06-24 14:03 UTCEPSS rescore
  14. 2026-06-24 14:03 UTCEPSS rescore
  15. 2026-06-23 21:31 UTCEPSS rescore
  16. 2026-06-23 21:31 UTCEPSS rescore
  17. 2026-06-21 01:58 UTCEPSS rescore
  18. 2026-06-21 01:58 UTCEPSS rescore
  19. 2026-06-18 17:51 UTCEPSS rescore
  20. 2026-06-18 17:51 UTCEPSS rescore
  21. 2026-06-17 17:51 UTCEPSS rescore
  22. 2026-06-17 17:51 UTCEPSS rescore
  23. 2026-06-17 17:51 UTCEPSS rescore
  24. 2026-06-15 17:46 UTCEPSS rescore
  25. 2026-06-13 22:58 UTCEPSS rescore
Show 16 more
  1. 2026-06-13 22:58 UTCEPSS rescore
  2. 2026-06-12 23:10 UTCEPSS rescore
  3. 2026-06-12 23:10 UTCEPSS rescore
  4. 2026-06-10 22:16 UTCEPSS rescore
  5. 2026-06-05 22:45 UTCEPSS rescore
  6. 2026-06-05 06:09 UTCEPSS rescore
  7. 2026-06-05 06:09 UTCEPSS rescore
  8. 2026-06-01 13:50 UTCEPSS rescore
  9. 2026-06-01 13:50 UTCEPSS rescore
  10. 2026-05-28 13:43 UTCEPSS rescore
  11. 2026-05-28 13:43 UTCEPSS rescore
  12. 2026-05-26 10:14 UTCEG score recompute
  13. 2026-05-26 10:14 UTCGHSA enrichment
  14. 2026-05-26 07:17 UTCEPSS rescore
  15. 2026-05-26 07:17 UTCEPSS rescore
  16. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(3 references)

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

  • Exploit-DBEDB-50382
    First seen Oct 6, 2021

    Wordpress Plugin BulletProof Security 5.1 - Sensitive Information Disclosure

    Open source ↗
  • Metasploitauxiliary/scanner/http/wp_bulletproofsecurity_backups✓ verified
    First seen Sep 17, 2021

    Wordpress BulletProof Security Backup Disclosure

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-39327.yaml
    First seen Jan 1, 2021

    WordPress BulletProof Security 5.1 Information Disclosure

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-39327?
CVE-2021-39327 is a medium vulnerability published on September 17, 2021. The BulletProof Security WordPress plugin is vulnerable to sensitive information disclosure due to a file path disclosure in the publicly accessible ~/dbbackuplog.txt file which grants attackers the full path of the site, in addition to the path of database backup files. This affects versions up…
When was CVE-2021-39327 disclosed?
CVE-2021-39327 was first published in the National Vulnerability Database on September 17, 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-2021-39327 actively exploited?
CVE-2021-39327 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-39327?
CVE-2021-39327 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2021-39327?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39327, 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.

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