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High

Moodle vulnerable to Cross-site Scripting

  • Disclosed: 03.02.2026
  • Updated: 11.10.2026 10:22

A flaw was found in Moodle. This vulnerability, known as Cross-site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.

Affected software

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PlatformPackageVulnerable versionsFixed in
Composer package moodle/moodle < 4.1.22, >= 4.4.0-beta, < 4.4.12, >= 4.5.0-beta, < 4.5.8, >= 5.0.0-beta, < 5.0.4, >= 5.1.0-beta, < 5.1.1 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1

References

CVSS score 7.3/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE)
CWE-79
Platform
Composer
Package
moodle/moodle
Disclosed
03.02.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-6mmv-f6c6-v6q8 - CC BY 4.0

Vulnerability history: moodle/moodle

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (437) in the archive
Total entries
437
First → latest
03.2021 02.2026
Without a fix
10
Exploited in attacks
0

Severity breakdown

  • Critical 16
  • High 68
  • Medium 318
  • Low 35

Disclosures per year

Severity:
  1. Moodle has a Remote Code Execution risk via file restore
    High · 7.2 CVE-2026-26045 >= 5.1.0-beta, < 5.1.2, >= 5.0.0-beta, < 5.0.5, < 4.5.9 5.1.2, 5.0.5, 4.5.9
  2. Moodle Affected by Improper Restriction of Excessive Authentication Attempts
    High · 7.5 CVE-2025-67853 < 4.1.22, >= 4.4.0-beta, < 4.4.12, >= 4.5.0-beta, < 4.5.8, >= 5.0.0-beta, < 5.0.4, >= 5.1.0-beta, < 5.1.1 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
  3. Moodle authentication bypass vulnerability
    High · 8.1 CVE-2025-67848 < 4.1.22, >= 4.4.0-beta, < 4.4.12, >= 4.5.0-beta, < 4.5.8, >= 5.0.0-beta, < 5.0.4, >= 5.1.0-beta, < 5.1.1 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
  4. Moodle Cross-site Scripting (XSS) vulnerability
    High · 7.3 CVE-2025-67849 < 4.1.22, >= 4.4.0-beta, < 4.4.12, >= 4.5.0-beta, < 4.5.8, >= 5.0.0-beta, < 5.0.4, >= 5.1.0-beta, < 5.1.1 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
  5. Moodle vulnerable to Cross-site Scripting this entry
    High · 7.3 CVE-2025-67850 < 4.1.22, >= 4.4.0-beta, < 4.4.12, >= 4.5.0-beta, < 4.5.8, >= 5.0.0-beta, < 5.0.4, >= 5.1.0-beta, < 5.1.1 4.1.22, 4.4.12, 4.5.8, 5.0.4, 5.1.1
  6. Moodle affected by a code injection vulnerability
    High · 8.8 CVE-2025-67847 >= 5.1.0-beta, < 5.1.1, >= 5.0.0-beta, < 5.0.4, >= 4.5.0-beta, < 4.5.8, >= 4.2.0-beta, < 4.4.12, < 4.1.22 5.1.1, 5.0.4, 4.5.8, 4.4.12, 4.1.22
  7. Moodle vulnerable to brute-force password guesses
    High · 7.5 CVE-2025-62399 >= 5.0.0-beta, < 5.0.3, >= 4.5.0-beta, < 4.5.7, >= 4.2.0-beta, < 4.4.11, < 4.1.21 5.0.3, 4.5.7, 4.4.11, 4.1.21
  8. Moodle has an authenticated remote code execution risk in the Moodle LMS EQUELLA repository
    High · 8.8 CVE-2025-3642 < 4.1.18, >= 4.3.0-beta, < 4.3.12, >= 4.4.0-beta, < 4.4.8, >= 4.5.0-beta, < 4.5.4 4.1.18, 4.3.12, 4.4.8, 4.5.4
  9. Moodle has an authenticated remote code execution risk in the Moodle LMS Dropbox repository
    High · 8.8 CVE-2025-3641 < 4.1.18, >= 4.3.0-beta, < 4.3.12, >= 4.4.0-beta, < 4.4.8, >= 4.5.0-beta, < 4.5.4 4.1.18, 4.3.12, 4.4.8, 4.5.4
  10. Moodle allows unauthenticated REST API user data exposure
    High · 7.5 CVE-2025-32044 >= 4.5.0-beta, < 4.5.3 4.5.3
  11. Moodle allows reflected XSS via question bank filter
    High · 8.3 CVE-2025-26530 >= 4.5.0-beta, < 4.5.2, >= 4.4.0-beta, < 4.4.6, >= 4.3.0-beta, < 4.3.10 4.5.2, 4.4.6, 4.3.10
  12. Moodle has a stored XSS risk in admin live log
    High · 8.3 CVE-2025-26529 >= 4.5.0-beta, < 4.5.2, >= 4.4.0-beta, < 4.4.6, >= 4.3.0-beta, < 4.3.10, < 4.1.16 4.5.2, 4.4.6, 4.3.10, 4.1.16
  13. Moodle has an arbitrary file read risk through pdfTeX
    High · 8.6 CVE-2025-26525 >= 4.5.0-beta, < 4.5.2, >= 4.4.0-beta, < 4.4.6, >= 4.3.0-beta, < 4.3.10, < 4.1.16 4.5.2, 4.4.6, 4.3.10, 4.1.16
  14. Moodle has a SQL injection risk in course search module list filter
    High · 8.1 CVE-2025-26533 >= 4.5.0-beta, < 4.5.2, >= 4.4.0-beta, < 4.4.6, >= 4.3.0-beta, < 4.3.10, < 4.1.16 4.5.2, 4.4.6, 4.3.10, 4.1.16
  15. Moodle Remote Code Execution vulnerability
    High · 8.1 CVE-2024-43425 < 4.1.12, >= 4.2.0-beta, < 4.2.9, >= 4.3.0-beta, < 4.3.6, >= 4.4.0-beta, < 4.4.2 4.1.12, 4.2.9, 4.3.6, 4.4.2
  16. Moodle has CSRF risk in Feedback non-respondents report
    High · 8.1 CVE-2024-43434 < 4.1.12, >= 4.2.0-beta, < 4.2.9, >= 4.3.0-beta, < 4.3.6, >= 4.4.0-beta, < 4.4.2 4.1.12, 4.2.9, 4.3.6, 4.4.2
  17. Moodle ReCAPTCHA can be bypassed on the login page
    High · 7.5 CVE-2024-34009 >= 4.3.0, < 4.3.4 4.3.4
  18. Moodle CSRF risk in analytics management of models
    High · 8.8 CVE-2024-34008 >= 4.3.0, < 4.3.4, >= 4.2.0, < 4.2.7, < 4.1.10 4.3.4, 4.2.7, 4.1.10
  19. Moodle Authenticated LFI risk in some misconfigured shared hosting environments
    High · 6.5 CVE-2024-34005 >= 4.3.0, < 4.3.4, >= 4.2.0, < 4.2.7, < 4.1.10 4.3.4, 4.2.7, 4.1.10
  20. Moodle Authenticated LFI risk in some misconfigured shared hosting environments
    High · 6.5 CVE-2024-34002 >= 4.3.0, < 4.3.4, >= 4.2.0, < 4.2.7, < 4.1.10 4.3.4, 4.2.7, 4.1.10
  21. Moodle CSRF risk in admin preset tool management of presets
    High · 8.4 CVE-2024-34001 >= 4.3.0, < 4.3.4, >= 4.2.0, < 4.2.7, < 4.1.10 4.3.4, 4.2.7, 4.1.10
  22. Moodle Improper Input Validation
    High CVE-2024-33999 >= 4.3.0, < 4.3.4 4.3.4
  23. Uncontrolled Resource Consumption in moodle
    High · 7.5 CVE-2024-25978 >= 4.3.0, < 4.3.3, >= 4.2.0, < 4.2.6, < 4.1.9 4.3.3, 4.2.6, 4.1.9
  24. Cross-Site Request Forgery in moodle
    High · 8.8 CVE-2024-25982 >= 4.3.0, < 4.3.3, >= 4.2.0, < 4.2.6, < 4.1.9 4.3.3, 4.2.6, 4.1.9
  25. Moodle Code Injection vulnerability
    High · 8.8 CVE-2023-5540 < 4.3.0-rc2 4.3.0-rc2
  26. Moodle vulnerable to Server Side Request Forgery
    High · 7.5 CVE-2023-35133 >= 4.2.0, < 4.2.1, >= 4.1.0, < 4.1.4, >= 4.0.0, < 4.0.9, >= 3.10.0, < 3.11.15, < 3.9.22 4.2.1, 4.1.4, 4.0.9, 3.11.15, 3.9.22
  27. Moodle SQL Injection vulnerability
    High · 7.3 CVE-2023-30944 < 4.2.0-rc2 4.2.0-rc2
  28. Moodle's Mustache pix helper contained a potential Mustache injection risk if combined with user input
    Critical · 9.8 CVE-2023-28333 >= 4.1.0, < 4.1.2, >= 4.0.0, < 4.0.7, >= 3.11.0, < 3.11.13, < 3.9.20 4.1.2, 4.0.7, 3.11.13, 3.9.20
  29. Moodle SQL Injection vulnerability
    High · 8.8 CVE-2023-28329 >= 4.1.0, < 4.1.2, >= 4.0.0, < 4.0.7, >= 3.11.0, < 3.11.13, < 3.9.20 4.1.2, 4.0.7, 3.11.13, 3.9.20
  30. Moodle vulnerable to Cross-site Request Forgery
    High · 8.8 CVE-2023-28335 >= 4.1.0, < 4.1.2 4.1.2
  31. Moodle vulnerable to Uncontrolled Resource Consumption
    High · 7.5 CVE-2021-36395 >= 3.11.0-beta, < 3.11.1, >= 3.10.0-beta, < 3.10.5, < 3.9.8 3.11.1, 3.10.5, 3.9.8
  32. Moodle Session Fixation vulnerability
    Critical · 9.8 CVE-2021-36394 >= 3.11.0-beta, < 3.11.1, >= 3.10.0-beta, < 3.10.5, < 3.9.8 3.11.1, 3.10.5, 3.9.8
  33. Moodle vulnerable to Server-Side Request Forgery
    High · 7.5 CVE-2021-36396 >= 3.11.0-beta, < 3.11.1, >= 3.10.0-beta, < 3.10.5, < 3.9.8 3.11.1, 3.10.5, 3.9.8
  34. Moodle SQL Injection vulnerability
    Critical · 9.8 CVE-2021-36393 >= 3.11.0-beta, < 3.11.1, >= 3.10.0-beta, < 3.10.5, < 3.9.8 3.11.1, 3.10.5, 3.9.8
  35. Moodle SQL Injection vulnerability
    Critical · 9.8 CVE-2021-36392 >= 3.11.0-beta, < 3.11.1, >= 3.10.0-beta, < 3.10.5, < 3.9.8 3.11.1, 3.10.5, 3.9.8
  36. Moodle Improper Access Control vulnerability
    High · 8.2 CVE-2023-23923 < 3.9.19, >= 3.10.0, < 3.11.12, >= 4.0.0-beta, < 4.0.6, >= 4.1.0-beta, < 4.1.1 3.9.19, 3.11.12, 4.0.6, 4.1.1
  37. Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library
    Critical · 9.1 CVE-2022-45152 >= 3.9, < 3.9.18, >= 3.11, < 3.11.11, >= 4.0, < 4.0.5 3.9.18, 3.11.11, 4.0.5
  38. Moodle Cross-Site Request Forgery (CSRF)
    High · 8.8 CVE-2022-2986 >= 3.11, < 3.11.9, >= 4.0, < 4.0.3 3.11.9, 4.0.3
  39. Moodle Minor SQL injection risk in admin user browsing
    Critical · 9.8 CVE-2022-40315 >= 3.9, < 3.9.17, >= 3.11, < 3.11.10, >= 4.0, < 4.0.4 3.9.17, 3.11.10, 4.0.4
  40. Moodle remote code execution
    Critical · 9.8 CVE-2022-40314 < 3.9.17, >= 3.11, < 3.11.10, >= 4.0, < 4.0.4 3.9.17, 3.11.10, 4.0.4
  41. Moodle Stored Cross-site Scripting and page denial of service
    High · 7.1 CVE-2022-40313 >= 3.9, < 3.9.17, >= 3.11, < 3.11.10, >= 4.0, < 4.0.4 3.9.17, 3.11.10, 4.0.4
  42. Moodle Incorrect Authorization vulnerability
    High · 8.8 CVE-2020-14321 >= 3.9.0-beta, < 3.9.1, >= 3.8.0-beta, < 3.8.4, >= 3.6.0-beta, < 3.7.7, < 3.5.13 3.9.1, 3.8.4, 3.7.7, 3.5.13
  43. Moodle PostScript Code Injection
    Critical · 9.8 CVE-2022-35649 >= 3.9, < 3.9.15, >= 3.11, < 3.11.8, >= 4.0, < 4.0.2 3.9.15, 3.11.8, 4.0.2
  44. Moodle Arbitrary file read when importing lesson questions
    High · 7.5 CVE-2022-35650 >= 3.9, < 3.9.15, >= 3.11, < 3.11.8, >= 4.0, < 4.0.2 3.9.15, 3.11.8, 4.0.2
  45. Moodle contains CSRF vulnerability
    High · 8.8 CVE-2021-43559 >= 3.11, < 3.11.4, >= 3.10, < 3.10.8, >= 3.9, < 3.9.11 3.11.4, 3.10.8, 3.9.11
  46. Moodle command execution vulnerability exists in the default legacy spellchecker plugin
    Critical · 9.1 CVE-2021-21809 = 3.10.0, = 3.11.2, = 3.8.0 no fix
  47. Moodle Arbitrary PHP code execution by site admins via Shibboleth configuration
    High · 7.2 CVE-2021-20187 >= 3.5, < 3.5.16, >= 3.8, < 3.8.7, >= 3.9, < 3.9.4, >= 3.10, < 3.10.1 3.5.16, 3.8.7, 3.9.4, 3.10.1
  48. Moodle Denial of Service
    High · 7.5 CVE-2020-25630 >= 3.9, < 3.9.2, >= 3.8, < 3.8.5, >= 3.7, < 3.7.8, >= 3.5, < 3.5.14 3.9.2, 3.8.5, 3.7.8, 3.5.14
  49. Moodle incorrect access control
    High · 8.8 CVE-2020-25629 >= 3.9, < 3.9.2, >= 3.8, < 3.8.5, >= 3.7, < 3.7.8, >= 3.5, < 3.5.14 3.9.2, 3.8.5, 3.7.8, 3.5.14
  50. Moodle vulnerable to RCE
    High · 8.8 CVE-2020-10738 >= 3.8, < 3.8.3, >= 3.7, < 3.7.6, >= 3.6, < 3.6.10, >= 3.5, < 3.5.12 3.8.3, 3.7.6, 3.6.10, 3.5.12
  51. Moodle Oauth 2 Insufficiently Protects Against Compromise
    Critical · 9.1 CVE-2019-14880 >= 3.7.0, < 3.7.3, >= 3.6.0, < 3.6.7, >= 3.5.0, < 3.5.9 3.7.3, 3.6.7, 3.5.9
  52. Moodle CSRF Vulnerability
    High · 8.8 CVE-2019-10186 >= 3.7.0, < 3.7.1, >= 3.6.0, < 3.6.5, >= 3.5.0, < 3.5.7 3.7.1, 3.6.5, 3.5.7
  53. Moodle all messaging conversations could be viewed
    High · 7.5 CVE-2019-10154 >= 3.6, < 3.6.4 3.6.4
  54. Incorrect Calculation in moodle
    Critical · 9.8 CVE-2022-30600 >= 4.0, < 4.0.1, >= 3.9, < 3.9.14, >= 3.10, < 3.10.11, >= 3.11, < 3.11.7 4.0.1, 3.9.14, 3.10.11, 3.11.7
  55. SQL injection in moodle
    Critical · 9.8 CVE-2022-30599 >= 4.0, < 4.0.1, >= 3.11, < 3.11.7, >= 3.10, < 3.10.11, >= 3.9, < 3.9.14 4.0.1, 3.11.7, 3.10.11, 3.9.14
  56. Moodle Unrestricted file upload vulnerability
    High · 8.8 CVE-2016-9187 >= 2.0.1, <= 3.2.1 no fix
  57. Moodle SQL injection via user preferences
    Critical · 9.8 CVE-2017-2641 >= 2.7, < 2.7.19, >= 3.0, < 3.0.9, >= 3.1, < 3.1.5, >= 3.2, < 3.2.2 2.7.19, 3.0.9, 3.1.5, 3.2.2
  58. Moodle Portfolio script allows instantiation of class chosen by user
    High · 8.1 CVE-2018-1137 >= 3.1, < 3.1.12, >= 3.2, < 3.2.9, >= 3.3, < 3.3.6, >= 3.4, < 3.4.3 3.1.12, 3.2.9, 3.3.6, 3.4.3
  59. Moodle SSRF Vulnerability
    High · 7.5 CVE-2019-6970 >= 3.5.0, < 3.5.4 3.5.4
  60. Moodle XML import of ddwtos could lead to intentional remote code execution
    High · 8.8 CVE-2018-14630 >= 3.5.0, < 3.5.2, >= 3.4.0, < 3.4.5, >= 3.2.0, < 3.3.8, < 3.1.14 3.5.2, 3.4.5, 3.3.8, 3.1.14
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