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Grav Admin Plugin is vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/accounts/groups/[group]` parameter `data[readableName]`

  • Ujawniono: 02.12.2025
  • Aktualizacja: 11.10.2026 10:22

Summary

A Stored Cross-Site Scripting (XSS) vulnerability was identified in the /admin/accounts/groups/Grupo endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[readableName] parameter. The injected scripts are stored on the server and executed automatically whenever the affected page is accessed by users, posing a significant security risk.

Details

Vulnerable Endpoint: POST /admin/accounts/groups/Grupo
Parameter: data[readableName]

The application fails to properly validate and sanitize user input in the data[readableName] parameter. This lack of input handling allows attackers to inject arbitrary script content that is stored in the application and executed in the browser of any user who views the affected group configuration.

PoC

Payload:

<ScRipT>alert('PoC-XSS')</ScRipT>

  1. Navigate to Accounts > Groups in the administrative panel.

  2. Create a new group or edit an existing one.

  3. In the Display Name field (data[readableName]), insert the payload above and save the changes.

image

The following HTTP request was generated during this action: image

  1. Next, go to Accounts > Users and open any user profile.

image

  1. The malicious script is executed immediately in the browser when the page loads, confirming the existence of a Stored XSS vulnerability.

image

Impact

Stored XSS vulnerabilities can result in serious consequences, including:

  • Session hijacking: Attackers can steal authentication cookies or tokens

  • Malware delivery: Inserting scripts that download malicious content

  • Credential theft: Capturing usernames and passwords through injected forms

  • Sensitive data exposure: Accessing data stored in the browser or the application

  • Browser takeover: Executing arbitrary commands in the user’s session

  • Phishing attacks: Redirecting users to fake login or malicious sites

  • Website defacement: Altering page content shown to users

  • Reputational damage: Undermining trust in the platform or organization

by CVE-Hunters

Czego dotyczy

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PlatformaPaczkaPodatne wersjePoprawka w wersji
Paczka Composer getgrav/grav < 1.8.0-beta.27 1.8.0-beta.27

Odnośniki

Ocena CVSS -
Wektor CVSS
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H
Słabość (CWE)
CWE-79
Platforma
Composer
Paczka
getgrav/grav
Ujawniono
02.12.2025
Aktualizacja
11.10.2026 10:22

Źródła i licencje

OSV / GitHub Advisory Database - GHSA-rmw5-f87r-w988 - CC BY 4.0

Historia podatności: getgrav/grav

Wszystkie opisane podatności tej paczki (Paczka Composer), od najnowszej. Widać, czy to jednorazowa wpadka, czy paczka, której trzeba pilnować.

Wszystkie (99) w archiwum
Wszystkich wpisów
99
Pierwsza → ostatnia
11.2019 09.2026
Bez poprawki
6
Wykorzystywana w atakach
0

Rozkład istotności

  • Krytyczna 7
  • Wysoka 47
  • Średnia 41
  • Niska 4

Ujawnienia w latach

Istotność:
  1. Grav CMS vulnerable to remote code execution via .zip file upload
    Wysoka · 8.8 CVE-2026-72819 < 2.0.13 2.0.13
  2. Grav: Missing admin.super guard on core group blueprint access field allows admin.users operator to escalate to super-admin
    Wysoka · 9.1 CVE-2026-75837 < 2.0.14 2.0.14
  3. Grav: Blueprint dynamic-data bare-function branch is denylist-gated and omits error_log, giving arbitrary file write
    Krytyczna · 8.8 CVE-2026-75827 < 2.0.15 2.0.15
  4. Grav: detectXss() misses an event-handler attribute after an unpaired quote in an unquoted attribute value, giving stored XSS
    Krytyczna · 8.7 CVE-2026-75828 < 2.0.15 2.0.15
  5. Grav: Unauthenticated Path Traversal via Missing Directory-Boundary Check in `plugin-asset-map.php` Static Asset Server (`index.php`)
    Wysoka · 5.9 CVE-2026-74907 < 2.0.15 2.0.15
  6. Grav: Path Traversal in MediaUploadTrait::deleteFile() Allows Arbitrary File Deletion
    Wysoka · 8.1 CVE-2026-72695 < 2.0.16 2.0.16
  7. Grav: media_directory() Twig function allows filesystem path traversal and file content disclosure from sandboxed page content
    Wysoka · 6.5 CVE-2026-72697 < 2.0.16 2.0.16
  8. Grav: UserInterface offsetget/offsetexists allow-listed in Twig sandbox let editor-authored content leak hashed_password and 2FA secrets via offsetGet()
    Wysoka · 7.7 CVE-2026-76839 < 2.0.16 2.0.16
  9. Grav: config_denied_paths default list omits `system`, exposing real secrets (e.g. system.cache.redis.password) via the Twig sandbox when config_access is enabled
    Wysoka · 7.5 CVE-2026-76846 < 2.0.16 2.0.16
  10. Grav: The system, site, and theme Twig variables bypass the content sandbox entirely and are never covered by config_denied_paths
    Wysoka · 6.5 CVE-2026-72698 < 2.0.16 2.0.16
  11. Grav: Path Traversal in ImageMedium::watermark() — arbitrary file disclosure via publicly-cached images
    Wysoka CVE-2026-69089 >= 2.0.10, < 2.0.11 2.0.11
  12. Grav: Incomplete callable validation in blueprint dynamic fields allows arbitrary static method invocation and file disclosure
    Wysoka · 8.1 CVE-2026-69088 >= 2.0.7, < 2.0.11 2.0.11
  13. Grav: FlexDirectory::dynamicDataField() executes arbitrary callables from blueprint data with no validation
    Wysoka · 8.8 CVE-2026-65608 >= 1.7.0, < 2.0.9 2.0.9
  14. Grav: 2FA Bypass via 'login.regenerate2FASecret' - Secret Rotation During Pending Challenge
    Wysoka · 7.4 CVE-2026-62232 < 2.0.4 2.0.4
  15. Grav: Remote code execution via unrestricted callable in Blueprint::dynamicData()
    Wysoka CVE-2026-64850 < 2.0.7 2.0.7
  16. Grav: .htaccess file extension rules bypass via case variation on case-insensitive filesystems
    Wysoka CVE-2026-62230 < 2.0.4 2.0.4
  17. Grav: Unauthenticated denial of service via unbounded image derivative dimensions
    Wysoka CVE-2026-53653 >= 2.0.0-beta.1, < 2.0.0-rc.8, < 1.7.53 2.0.0-rc.8, 1.7.53
  18. Grav: Twig sandbox allows editor-role users to exfiltrate all plugin secrets via Config::toArray()
    Wysoka · 7.7 CVE-2026-44738 < 2.0.0-rc.2 2.0.0-rc.2
  19. Low-privileged Grav API users can create super-admin accounts via blueprint-upload
    Wysoka CVE-2026-42844 < 2.0.0-beta.4 2.0.0-beta.4
  20. Grav is Vulnerable to Stored XSS via Tag Injection
    Wysoka · 8.9 CVE-2026-42611 < 2.0.0-beta.2 2.0.0-beta.2
  21. Grav has Unauthenticated Path Traversal & Arbitrary File Write in its FormFlash component
    Wysoka CVE-2026-42608 < 2.0.0-beta.2 2.0.0-beta.2
  22. Grav Vulnerable to Administrative Account Disruption and Privilege De-escalation via User Overwrite Logic
    Wysoka · 8.1 CVE-2026-42609 < 2.0.0-beta.2 2.0.0-beta.2
  23. Grav has multiple RCE vectors: unsafe unserialize (x3), command injection in git clone, SSTI blocklist bypass
    Krytyczna CVE-2026-56700 < 2.0.0-beta.2 2.0.0-beta.2
  24. Grav Vulnerable to Publisher-Level Stored XSS via Unquoted Event Attributes
    Wysoka · 8.5 CVE-2026-42612 < 2.0.0-beta.2 2.0.0-beta.2
  25. Grav Vulnerable to Privilege Escalation via Missing Server-Side Validation of groups/access
    Krytyczna · 9.4 CVE-2026-42613 < 2.0.0-beta.2 2.0.0-beta.2
  26. Grav Vulnerable to Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature
    Krytyczna · 9.1 CVE-2026-42607 < 2.0.0-beta.2 2.0.0-beta.2
  27. Grav may be vulnerable to SSRF attack via Twig Templates
    Krytyczna · 9.1 CVE-2025-66844 <= 1.7.49.5 brak poprawki
  28. Grav is vulnerable to Server-Side Template Injection (SSTI) via Forms
    Wysoka CVE-2025-66298 < 1.8.0-beta.27 1.8.0-beta.27
  29. Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass
    Wysoka CVE-2025-66294 < 1.8.0-beta.27 1.8.0-beta.27
  30. Grav vulnerable to Privilege Escalation and Authenticated Remote Code Execution via Twig Injection
    Wysoka CVE-2025-66297 < 1.8.0-beta.27 1.8.0-beta.27
  31. Grav vulnerable to Path traversal / arbitrary YAML write via user creation leading to Account Takeover / System Corruption
    Wysoka · 8.8 CVE-2025-66295 < 1.8.0-beta.27 1.8.0-beta.27
  32. Grav vulnerable to Denial of Service via Improper Input Handling in 'Supported' Parameter
    Wysoka CVE-2025-66305 < 1.8.0-beta.27 1.8.0-beta.27
  33. Grav Admin Plugin is vulnerable to Cross-Site Scripting (XSS) Stored endpoint `/admin/accounts/groups/[group]` parameter `data[readableName]` ten wpis
    Średnia CVE-2025-66312 < 1.8.0-beta.27 1.8.0-beta.27
  34. Grav has Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions
    Wysoka CVE-2025-66301 < 1.8.0-beta.27 1.8.0-beta.27
  35. Grav is vulnerable to Arbitrary File Read
    Wysoka · 8.5 CVE-2025-66300 < 1.8.0-beta.27 1.8.0-beta.27
  36. Grav is Vulnerable to Security Sandbox Bypass with SSTI (Server Side Template Injection)
    Wysoka · 8.8 CVE-2025-66299 < 1.8.0-beta.27 1.8.0-beta.27
  37. Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check Allows Admin Account Takeover
    Wysoka · 8.8 CVE-2025-66296 < 1.8.0-beta.27 1.8.0-beta.27
  38. Grav Vulnerable to Arbitrary File Read to Account Takeover
    Wysoka · 8.5 CVE-2024-34082 < 1.7.46 1.7.46
  39. Server Side Template Injection (SSTI) via Twig escape handler
    Wysoka · 8.8 CVE-2024-28119 < 1.7.45 1.7.45
  40. Server Side Template Injection (SSTI)
    Wysoka · 8.8 CVE-2024-28118 < 1.7.45 1.7.45
  41. Server Side Template Injection (SSTI)
    Wysoka · 8.8 CVE-2024-28117 < 1.7.45 1.7.45
  42. Server-Side Template Injection (SSTI) with Grav CMS security sandbox bypass
    Wysoka · 8.8 CVE-2024-28116 < 1.7.45 1.7.45
  43. Grav File Upload Path Traversal
    Wysoka · 8.8 CVE-2024-27921 < 1.7.45 1.7.45
  44. Remote Code Execution by uploading a phar file using frontmatter
    Wysoka · 8.8 CVE-2024-27923 < 1.7.43 1.7.43
  45. grav Server-side Template Injection (SSTI) mitigation bypass
    Wysoka · 7.2 CVE-2023-37897 < 1.7.42.2 1.7.42.2
  46. Grav Server-side Template Injection (SSTI) via Twig Default Filters
    Wysoka · 7.2 CVE-2023-34448 < 1.7.42 1.7.42
  47. Grav Server-side Template Injection (SSTI) via Denylist Bypass Vulnerability
    Wysoka · 7.2 CVE-2023-34253 < 1.7.42 1.7.42
  48. Grav Server-side Template Injection (SSTI) via Twig Default Filters
    Wysoka · 7.2 CVE-2023-34252 < 1.7.42 1.7.42
  49. Grav Server Side Template Injection (SSTI) vulnerability
    Krytyczna · 9.1 CVE-2023-34251 < 1.7.42 1.7.42
  50. Code injection in grav
    Wysoka · 7.2 CVE-2022-2073 < 1.7.34 1.7.34
  51. Grav CMS Arbitrary File Deletion
    Wysoka · 8.1 CVE-2020-29555 >= 1.7.0-beta.1, <= 1.7.0-rc.17, < 1.6.30 1.6.30
  52. Grav CMS Cross-Site Request Forgery (CSRF)
    Wysoka · 8.8 CVE-2020-29553 >= 1.7.0-beta.1, <= 1.7.0-rc.17, < 1.6.30 1.6.30
  53. Stored Cross-site Scripting in grav
    Wysoka · 7.1 CVE-2022-0970 < 1.7.31 1.7.31
  54. Path traversal in grav
    Wysoka · 8.8 CVE-2021-3924 <= 1.7.24 brak poprawki
  55. Grav's Twig processing allowing dangerous PHP functions by default
    Wysoka · 8.4 CVE-2021-29440 < 1.7.11 1.7.11

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