CVE-2018-1133

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 32% (98th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 31%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

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
Severity88% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
31%
EPSS %ILE
98th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 25, 2018

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. Patch available.
generic🟡 PoC Available

Moodle 3.4.1 - Remote Code Execution - PHP webapps Exploit

https://www.exploit-db.com/exploits/46551/
generic

CVE-2018-1133 - PSIRT.COM

http://www.securityfocus.com/bid/104307

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
moodle/moodlev3.4.0 ... v3.4.2 (7 versions)
  • 3.1 up to 3.1.12: fixed in 3.1.12
  • 3.2 up to 3.2.9: fixed in 3.2.9
  • 3.3 up to 3.3.6: fixed in 3.3.6
  • 3.4 up to 3.4.3: fixed in 3.4.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 19× 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.

Showing the most recent 100 of 138 total refreshes for this CVE.

  1. 2026-10-04 23:18 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-10-01 19:44 UTCEPSS rescore
  4. 2026-09-30 14:59 UTCEPSS rescore
  5. 2026-09-30 09:52 UTCEG score recompute
  6. 2026-09-26 15:53 UTCEPSS rescore
  7. 2026-09-24 13:59 UTCEPSS rescore
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  9. 2026-09-20 20:10 UTCEPSS rescore
  10. 2026-09-19 15:36 UTCEPSS rescore
  11. 2026-09-19 13:02 UTCOSV refresh
  12. 2026-09-18 19:22 UTCEPSS rescore
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  24. 2026-09-01 03:32 UTCEPSS rescore
  25. 2026-08-31 16:34 UTCOSV refresh
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  1. 2026-08-28 21:36 UTCEPSS rescore
  2. 2026-08-27 14:21 UTCEPSS rescore
  3. 2026-08-26 14:42 UTCEPSS rescore
  4. 2026-08-25 13:44 UTCEPSS rescore
  5. 2026-08-21 23:45 UTCEPSS rescore
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  7. 2026-08-19 17:00 UTCEPSS rescore
  8. 2026-08-18 13:44 UTCEPSS rescore
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  10. 2026-08-16 14:51 UTCEPSS rescore
  11. 2026-08-16 02:10 UTCEPSS rescore
  12. 2026-08-15 01:26 UTCEPSS rescore
  13. 2026-08-14 21:24 UTCOSV refresh
  14. 2026-08-13 21:56 UTCEPSS rescore
  15. 2026-08-12 13:46 UTCEPSS rescore
  16. 2026-08-08 16:32 UTCEPSS rescore
  17. 2026-08-07 16:23 UTCEPSS rescore
  18. 2026-08-06 13:42 UTCEPSS rescore
  19. 2026-08-05 19:13 UTCEPSS rescore
  20. 2026-08-04 15:05 UTCEPSS rescore
  21. 2026-08-01 04:12 UTCEPSS rescore
  22. 2026-07-30 16:24 UTCEPSS rescore
  23. 2026-07-30 10:14 UTCOSV refresh
  24. 2026-07-30 01:27 UTCEPSS rescore
  25. 2026-07-28 15:32 UTCEPSS rescore
  26. 2026-07-26 14:51 UTCEPSS rescore
  27. 2026-07-26 14:51 UTCEPSS rescore
  28. 2026-07-25 14:14 UTCEPSS rescore
  29. 2026-07-24 14:14 UTCEPSS rescore
  30. 2026-07-24 14:14 UTCEPSS rescore
  31. 2026-07-23 14:15 UTCEPSS rescore
  32. 2026-07-23 01:32 UTCEG score recompute
  33. 2026-07-22 22:12 UTCEG score recompute
  34. 2026-07-22 14:05 UTCEPSS rescore
  35. 2026-07-21 15:22 UTCEPSS rescore
  36. 2026-07-20 17:04 UTCEPSS rescore
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  40. 2026-07-16 16:59 UTCEPSS rescore
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  42. 2026-07-15 16:55 UTCEPSS rescore
  43. 2026-07-15 16:55 UTCEPSS rescore
  44. 2026-07-13 06:10 UTCEPSS rescore
  45. 2026-07-12 19:07 UTCOSV refresh
  46. 2026-07-12 05:43 UTCEPSS rescore
  47. 2026-07-11 08:24 UTCEPSS rescore
  48. 2026-07-09 19:06 UTCEPSS rescore
  49. 2026-07-07 13:42 UTCEPSS rescore
  50. 2026-07-07 13:42 UTCEPSS rescore
  51. 2026-07-05 02:27 UTCEPSS rescore
  52. 2026-07-04 06:28 UTCEPSS rescore
  53. 2026-07-04 06:28 UTCEPSS rescore
  54. 2026-07-02 16:54 UTCEPSS rescore
  55. 2026-07-01 15:03 UTCEPSS rescore
  56. 2026-07-01 15:03 UTCEPSS rescore
  57. 2026-06-30 23:20 UTCEPSS rescore
  58. 2026-06-30 23:19 UTCEPSS rescore
  59. 2026-06-28 14:04 UTCEPSS rescore
  60. 2026-06-28 04:53 UTCEPSS rescore
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  62. 2026-06-27 03:06 UTCEPSS rescore
  63. 2026-06-27 03:06 UTCEPSS rescore
  64. 2026-06-25 13:47 UTCEPSS rescore
  65. 2026-06-25 13:47 UTCEPSS rescore
  66. 2026-06-24 14:02 UTCEPSS rescore
  67. 2026-06-24 14:02 UTCEPSS rescore
  68. 2026-06-24 03:29 UTCOSV refresh
  69. 2026-06-23 21:30 UTCEPSS rescore
  70. 2026-06-23 21:30 UTCEPSS rescore
  71. 2026-06-23 21:30 UTCEPSS rescore
  72. 2026-06-21 14:54 UTCEPSS rescore
  73. 2026-06-21 14:54 UTCEPSS rescore
  74. 2026-06-21 01:57 UTCEPSS rescore
  75. 2026-06-21 01:57 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-46551
    First seen Mar 15, 2019

    Moodle 3.4.1 - Remote Code Execution

    Open source ↗
  • GitHub PoCdarrynten/MoodleExploit
    First seen Mar 15, 2019

    Noodle [Moodle RCE] (v3.4.1) - CVE-2018-1133

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2018-1133?
CVE-2018-1133 is a high vulnerability published on May 25, 2018. An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
When was CVE-2018-1133 disclosed?
CVE-2018-1133 was first published on May 25, 2018, 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-2018-1133 actively exploited?
CVE-2018-1133 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31% probability of exploitation in the next 30 days (98th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-1133?
CVE-2018-1133 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-1133?
A fix for CVE-2018-1133 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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