CVE-2018-15133

CRITICALNVD 8.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-01-16), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.1 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 77%CVSS: 8.1Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

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

In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and PendingBroadcast in gadgetchains/Laravel/RCE/3/chain.php in phpggc. The attacker must know the application key, which normally would never occur, but could happen if the attacker previously had privileged access or successfully accomplished a previous attack.

CVSS v3
8.1
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
77%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

August 9, 2018

Last Modified

November 7, 2025

Advisory Details (3)

Auto-updated Jun 3, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-15133
generic

Upgrade Guide | Laravel 5.6 - The clean stack for Artisans and agents

https://laravel.com/docs/5.6/upgrade#upgrade-5.6.30
generic

Packet Storm

http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
laravel/frameworkv5.6.0 ... v5.6.9 (30 versions)5.6.30—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 48× 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 163 total refreshes for this CVE.

  1. 2026-09-07 16:06 UTCEG score recompute
  2. 2026-09-07 15:57 UTCEPSS rescore
  3. 2026-09-06 14:16 UTCEG score recompute
  4. 2026-09-06 13:43 UTCEPSS rescore
  5. 2026-09-05 16:53 UTCEG score recompute
  6. 2026-09-05 15:24 UTCEPSS rescore
  7. 2026-09-04 17:38 UTCCISA KEV update
  8. 2026-09-02 17:33 UTCCISA KEV update
  9. 2026-09-02 15:45 UTCEG score recompute
  10. 2026-09-02 14:07 UTCEPSS rescore
  11. 2026-09-02 14:07 UTCEPSS rescore
  12. 2026-08-31 14:19 UTCCISA KEV update
  13. 2026-08-30 23:25 UTCEG score recompute
  14. 2026-08-30 19:13 UTCEPSS rescore
  15. 2026-08-29 00:14 UTCEG score recompute
  16. 2026-08-28 21:36 UTCEPSS rescore
  17. 2026-08-27 17:22 UTCCISA KEV update
  18. 2026-08-26 17:41 UTCCISA KEV update
  19. 2026-08-26 16:24 UTCEG score recompute
  20. 2026-08-26 14:41 UTCEPSS rescore
  21. 2026-08-25 14:43 UTCEG score recompute
  22. 2026-08-25 13:44 UTCEPSS rescore
  23. 2026-08-24 18:52 UTCCISA KEV update
  24. 2026-08-24 17:19 UTCEG score recompute
  25. 2026-08-24 08:46 UTCEG score recompute
Show 75 more
  1. 2026-08-23 02:48 UTCEG score recompute
  2. 2026-08-23 00:14 UTCEPSS rescore
  3. 2026-08-21 16:49 UTCCISA KEV update
  4. 2026-08-20 23:25 UTCEG score recompute
  5. 2026-08-20 22:51 UTCEPSS rescore
  6. 2026-08-20 17:06 UTCCISA KEV update
  7. 2026-08-19 17:33 UTCCISA KEV update
  8. 2026-08-19 17:24 UTCEG score recompute
  9. 2026-08-19 17:00 UTCEPSS rescore
  10. 2026-08-18 16:58 UTCCISA KEV update
  11. 2026-08-18 15:45 UTCEG score recompute
  12. 2026-08-18 13:43 UTCEPSS rescore
  13. 2026-08-17 13:56 UTCCISA KEV update
  14. 2026-08-16 03:52 UTCEG score recompute
  15. 2026-08-16 02:10 UTCEPSS rescore
  16. 2026-08-15 02:11 UTCEG score recompute
  17. 2026-08-15 01:26 UTCEPSS rescore
  18. 2026-08-12 14:18 UTCEG score recompute
  19. 2026-08-12 13:46 UTCEPSS rescore
  20. 2026-08-11 19:32 UTCCISA KEV update
  21. 2026-08-11 16:54 UTCEG score recompute
  22. 2026-08-11 13:36 UTCEPSS rescore
  23. 2026-08-10 15:15 UTCEG score recompute
  24. 2026-08-08 20:29 UTCEG score recompute
  25. 2026-08-08 16:32 UTCEPSS rescore
  26. 2026-08-07 18:49 UTCEG score recompute
  27. 2026-08-07 17:09 UTCCISA KEV update
  28. 2026-08-07 16:22 UTCEPSS rescore
  29. 2026-08-06 17:09 UTCEG score recompute
  30. 2026-08-06 13:42 UTCEPSS rescore
  31. 2026-08-06 13:42 UTCEPSS rescore
  32. 2026-08-05 17:25 UTCCISA KEV update
  33. 2026-08-04 17:02 UTCCISA KEV update
  34. 2026-08-04 13:45 UTCEG score recompute
  35. 2026-08-03 19:22 UTCCISA KEV update
  36. 2026-07-30 18:01 UTCEG score recompute
  37. 2026-07-30 16:24 UTCEPSS rescore
  38. 2026-07-30 09:24 UTCEG score recompute
  39. 2026-07-29 19:27 UTCCISA KEV update
  40. 2026-07-28 18:45 UTCEG score recompute
  41. 2026-07-28 15:32 UTCEPSS rescore
  42. 2026-07-27 19:24 UTCCISA KEV update
  43. 2026-07-27 17:17 UTCCISA KEV update
  44. 2026-07-26 11:00 UTCEG score recompute
  45. 2026-07-26 02:26 UTCEG score recompute
  46. 2026-07-24 14:14 UTCEPSS rescore
  47. 2026-07-23 01:33 UTCEG score recompute
  48. 2026-07-22 22:07 UTCEG score recompute
  49. 2026-07-22 19:40 UTCCISA KEV update
  50. 2026-07-22 17:50 UTCEG score recompute
  51. 2026-07-22 14:04 UTCEPSS rescore
  52. 2026-07-21 15:23 UTCEG score recompute
  53. 2026-07-21 15:21 UTCEPSS rescore
  54. 2026-07-21 14:37 UTCCISA KEV update
  55. 2026-07-20 17:57 UTCEG score recompute
  56. 2026-07-20 17:04 UTCEPSS rescore
  57. 2026-07-20 17:04 UTCEPSS rescore
  58. 2026-07-19 16:16 UTCEG score recompute
  59. 2026-07-19 14:28 UTCEPSS rescore
  60. 2026-07-17 08:26 UTCEG score recompute
  61. 2026-07-16 17:04 UTCCISA KEV update
  62. 2026-07-16 16:59 UTCEPSS rescore
  63. 2026-07-16 16:59 UTCEPSS rescore
  64. 2026-07-15 16:55 UTCEPSS rescore
  65. 2026-07-15 16:49 UTCCISA KEV update
  66. 2026-07-15 15:04 UTCCISA KEV update
  67. 2026-07-15 01:56 UTCEPSS rescore
  68. 2026-07-14 18:05 UTCCISA KEV update
  69. 2026-07-13 22:26 UTCEPSS rescore
  70. 2026-07-13 17:07 UTCCISA KEV update
  71. 2026-07-12 05:43 UTCEPSS rescore
  72. 2026-07-10 17:52 UTCCISA KEV update
  73. 2026-07-09 19:06 UTCEPSS rescore
  74. 2026-07-07 19:01 UTCCISA KEV update
  75. 2026-07-07 17:16 UTCCISA KEV update

Publicly available exploits

(8 references)

Working exploit code is in the public domain (1 Metasploit module) (6 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCyeahhbean/Laravel-CVE-2018-15133
    First seen Apr 27, 2025
    Open source ↗
  • GitHub PoCAzhariKun/CVE-2018-15133
    First seen Jan 3, 2021
    Open source ↗
  • GitHub PoCpwnedshell/Larascript
    First seen Dec 21, 2020

    Laravel RCE exploit. CVE-2018-15133

    Open source ↗
  • GitHub PoCaljavier/exploit_laravel_cve-2018-15133
    First seen Nov 13, 2020

    Exploit for Laravel Remote Code Execution with API_KEY (CVE-2018-15133)

    Open source ↗
  • GitHub PoCPrabesh01/Laravel-PHP-Unit-RCE-Auto-shell-uploader
    First seen Apr 5, 2020

    Laravel-PHP-Unit-RCE (CVE-2018-15133) Auto Exploiter and Shell Uploader

    Open source ↗
  • Exploit-DBEDB-47129✓ verified
    First seen Jul 16, 2019

    PHP Laravel Framework 5.5.40 / 5.6.x < 5.6.30 - token Unserialize Remote Command Execution (Metasploit)

    Open source ↗
  • GitHub PoCkozmic/laravel-poc-CVE-2018-15133
    First seen Aug 14, 2018

    PoC for CVE-2018-15133 (Laravel unserialize vulnerability)

    Open source ↗
  • Metasploitexploit/unix/http/laravel_token_unserialize_exec✓ verified
    First seen Aug 7, 2018

    PHP Laravel Framework token Unserialize Remote Command Execution

    Open source ↗

Frequently asked(6)

What is CVE-2018-15133?
CVE-2018-15133 is a critical vulnerability published on August 9, 2018. In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and PendingBroadcast in…
When was CVE-2018-15133 disclosed?
CVE-2018-15133 was first published in the National Vulnerability Database on August 9, 2018, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-15133 actively exploited?
Yes. CISA added CVE-2018-15133 to the Known Exploited Vulnerabilities catalog on January 16, 2024, affecting Laravel Laravel Framework. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-15133?
CVE-2018-15133 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-15133?
CVE-2018-15133 affects Laravel Laravel Framework. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2018-15133?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-15133, 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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