CVE-2021-42840

HIGHNVD 8.88.9▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.9 because EPSS predicts 59% probability of exploitation within the next 30 days (top 1.0% of all CVEs). NVD baseline CVSS 8.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Trending — 3 sources updated this weekWeaponized
8.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 59%
CISA-KEV: Not listedEPSS: 59%CVSS: 8.8Exploit: NoneExposed: 0

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

SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.

CVSS v3
8.8
EG Score
8.9(high)
EG Risk
71(Track)
EG Risk 71/100SSVC: 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
Severity89% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.0%
KEV
Not listed

Published

October 22, 2021

Last Modified

November 21, 2024

References (10)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× 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 14:16 UTCEPSS rescore
  2. 2026-07-23 02:04 UTCEG score recompute▲ 0.10
  3. 2026-07-22 22:51 UTCEG score recompute
  4. 2026-07-22 14:06 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-21 15:22 UTCEPSS rescore
  7. 2026-07-20 17:05 UTCEPSS rescore
  8. 2026-07-19 02:27 UTCEPSS rescore
  9. 2026-07-18 09:29 UTCOSV refresh
  10. 2026-07-16 17:00 UTCEPSS rescore
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  12. 2026-07-15 16:55 UTCEPSS rescore
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  14. 2026-07-13 22:27 UTCEPSS rescore
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  16. 2026-07-13 06:11 UTCEPSS rescore
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  18. 2026-07-12 05:44 UTCEPSS rescore
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  21. 2026-07-09 19:07 UTCEPSS rescore
  22. 2026-07-07 13:43 UTCEPSS rescore
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  25. 2026-07-02 16:57 UTCEPSS rescore
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  1. 2026-07-01 15:04 UTCEPSS rescore
  2. 2026-06-30 23:20 UTCEPSS rescore
  3. 2026-06-30 23:20 UTCEPSS rescore
  4. 2026-06-30 09:00 UTCOSV refresh
  5. 2026-06-29 14:04 UTCEPSS rescore
  6. 2026-06-28 04:54 UTCEPSS rescore
  7. 2026-06-28 04:54 UTCEPSS rescore
  8. 2026-06-27 03:06 UTCEPSS rescore
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  10. 2026-06-25 13:48 UTCEPSS rescore
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  12. 2026-06-24 14:03 UTCEPSS rescore
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  14. 2026-06-23 21:31 UTCEPSS rescore
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  16. 2026-06-21 01:58 UTCEPSS rescore
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  18. 2026-06-19 19:24 UTCEPSS rescore
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  20. 2026-06-18 17:51 UTCEPSS rescore
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  22. 2026-06-17 17:51 UTCEPSS rescore
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  25. 2026-06-16 17:51 UTCEPSS rescore
  26. 2026-06-16 17:51 UTCEPSS rescore
  27. 2026-06-15 17:46 UTCEPSS rescore
  28. 2026-06-13 22:58 UTCEPSS rescore
  29. 2026-06-13 22:58 UTCEPSS rescore
  30. 2026-06-12 23:10 UTCEPSS rescore
  31. 2026-06-12 18:40 UTCOSV refresh
  32. 2026-06-11 13:58 UTCEPSS rescore
  33. 2026-06-11 13:58 UTCEPSS rescore
  34. 2026-06-10 22:16 UTCEPSS rescore
  35. 2026-06-10 22:16 UTCEPSS rescore
  36. 2026-06-10 13:20 UTCEPSS rescore
  37. 2026-06-07 15:23 UTCEPSS rescore
  38. 2026-06-07 15:23 UTCEPSS rescore
  39. 2026-06-06 13:46 UTCEPSS rescore
  40. 2026-06-06 13:46 UTCEPSS rescore
  41. 2026-06-05 22:45 UTCEPSS rescore
  42. 2026-06-05 06:09 UTCEPSS rescore
  43. 2026-06-05 06:09 UTCEPSS rescore
  44. 2026-06-04 13:10 UTCEPSS rescore
  45. 2026-06-04 13:10 UTCEPSS rescore
  46. 2026-06-02 20:11 UTCEPSS rescore
  47. 2026-06-02 20:11 UTCEPSS rescore
  48. 2026-05-31 22:29 UTCEPSS rescore
  49. 2026-05-31 22:29 UTCEPSS rescore
  50. 2026-05-31 00:15 UTCEPSS rescore
  51. 2026-05-31 00:15 UTCEPSS rescore
  52. 2026-05-29 13:42 UTCEPSS rescore
  53. 2026-05-28 13:43 UTCEPSS rescore
  54. 2026-05-28 13:43 UTCEPSS rescore
  55. 2026-05-27 13:39 UTCEPSS rescore
  56. 2026-05-27 13:39 UTCEPSS rescore
  57. 2026-05-26 08:35 UTCEG score recompute
  58. 2026-05-26 08:35 UTCGHSA enrichment
  59. 2026-05-26 07:17 UTCEPSS rescore
  60. 2026-05-26 07:17 UTCEPSS rescore
  61. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(2 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-50531✓ verified
    First seen Nov 17, 2021

    SuiteCRM 7.11.18 - Remote Code Execution (RCE) (Authenticated) (Metasploit)

    Open source ↗
  • Metasploitexploit/linux/http/suitecrm_log_file_rce✓ verified
    First seen Apr 28, 2021

    SuiteCRM Log File Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-42840?
CVE-2021-42840 is a high vulnerability published on October 22, 2021. SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, loggerfilename can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were…
When was CVE-2021-42840 disclosed?
CVE-2021-42840 was first published in the National Vulnerability Database on October 22, 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-2021-42840 actively exploited?
CVE-2021-42840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-42840?
CVE-2021-42840 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.9.
How do I remediate CVE-2021-42840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-42840, 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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