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Medium

AVideo has Stored Cross-Site Scripting via Markdown Comment Injection

  • Disclosed: 20.02.2026
  • Updated: 11.10.2026 10:22

Vulnerability Type

Stored Cross-Site Scripting (XSS) — CWE-79.

Affected Product/Versions

AVideo 18.0.

Root Cause Summary

AVideo allows Markdown in video comments and uses Parsedown (v1.7.4) without Safe Mode enabled. Markdown links are not sufficiently sanitized, allowing javascript: URIs to be rendered as clickable links.

Impact Summary

An authenticated low-privilege attacker can post a malicious comment that injects persistent JavaScript. When another user clicks the link, the attacker can perform actions such as session hijacking, privilege escalation (including admin takeover), and data exfiltration.

Resolution/Fix

The issue was confirmed and fixed in the master branch. An official release will be published soon.

Workarounds

Until the release is available, validate and block unsafe URI schemes (e.g., javascript:) before rendering Markdown, and enable Parsedown Safe Mode.

Credits/Acknowledgement

Reported by Arkadiusz Marta (https://github.com/arkmarta/).

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package wwbn/avideo < 21.0 21.0

References

CVSS score -
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness (CWE)
CWE-79
Platform
Composer
Package
wwbn/avideo
Disclosed
20.02.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-rcqw-6466-3mv7 - CC BY 4.0

Vulnerability history: wwbn/avideo

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 (160) in the archive
Total entries
160
First → latest
04.2022 06.2026
Without a fix
143
Exploited in attacks
0

Severity breakdown

  • Critical 14
  • High 61
  • Medium 83
  • Low 2

Disclosures per year

Severity:
  1. AVideo has an incomplete fix of CVE-2026-33482: sanitizeFFmpegCommand still allows a single '&' (background operator), giving OS command execution at the same execAsync sh -c sink
    High · 8.1 CVE-2026-55173 <= 29.0 no fix
  2. AVideo Vulnerable to Unauthenticated .env File Exposure via Official Docker Compose Configuration
    High · 7.5 CVE-2026-33692 < 29.0 29.0
  3. WWBN AVideo: Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin
    Critical · 9.6 CVE-2026-54458 <= 29.0 no fix
  4. WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)
    High CVE-2026-49279 <= 29.0 no fix
  5. WWBN AVideo: Authenticated wallet credit bypass in AuthorizeNet processPayment endpoint
    High · 4.3 CVE-2026-47696 <= 29.0 no fix
  6. AVideo: OS command injection in on_publish.php execAsync via unescaped m3u8 URL
    High · 8.8 CVE-2026-45578 <= 29.0 no fix
  7. AVideo's Meet plugin: `uploadRecordedVideo.json.php` derives `users_id` from the uploaded filename and calls passwordless `User->login()`, allowing any caller with the Meet shared secret to obtain a session as arbitrary users including admin
    High · 8.1 CVE-2026-56345 <= 29.0 no fix
  8. AVideo Vulnerable to Exposure of Sensitive Information to an Unauthorized Actor and Missing Authorization
    High CVE-2026-43885 <= 29.0 no fix
  9. AVideo has SSRF Protection Bypass via HTTP Redirect and DNS Rebinding in isSSRFSafeURL()
    High · 7.7 CVE-2026-43884 <= 29.0 no fix
  10. AVideo has an Incomplete Fix for YPTSocket autoEvalCodeOnHTML Strip: Unauthenticated Cross-User JavaScript Execution via `$msg['json']` Relay Bypass
    High · 7.2 CVE-2026-43874 <= 29.0 no fix
  11. AVideo: Unauthenticated Disclosure of CloneSite `myKey` via Error Echo in `cloneClient.json.php` Enables Cross-Site DB Dump of the Configured Clone Server
    High · 7.5 CVE-2026-43873 <= 29.0 no fix
  12. WWBN AVideo: RCE cause by clonesite plugin
    High · 9.8 CVE-2026-41304 <= 29.0 no fix
  13. WWBN AVideo has an incomplete fix for CVE-2026-33502: Command Injection
    High · 9.3 CVE-2026-41064 <= 29.0 no fix
  14. WWBN AVideo has a SSRF via same-domain hostname with alternate port bypasses isSSRFSafeURL
    High · 7.7 CVE-2026-41060 <= 29.0 no fix
  15. WWBN AVideo has a CORS Origin Reflection Bypass via plugin/API/router.php and allowOrigin(true) Exposes Authenticated API Responses
    High · 7.1 CVE-2026-41057 <= 29.0 no fix
  16. WWBN AVideo has CORS Origin Reflection with Credentials on Sensitive API Endpoints Enables Cross-Origin Account Takeover
    High · 8.1 CVE-2026-41056 <= 29.0 no fix
  17. WWBN AVideo has Multiple CSRF Vulnerabilities in Admin JSON Endpoints (Category CRUD, Plugin Update Script)
    High · 7.1 CVE-2026-40926 <= 29.0 no fix
  18. WWBN AVideo has CSRF in configurationUpdate.json.php Enables Full Site Configuration Takeover Including Encoder URL and SMTP Credentials
    High · 8.3 CVE-2026-40925 <= 29.0 no fix
  19. WWBN AVideo YPTSocket WebSocket Broadcast Relay Leads to Unauthenticated Cross-User JavaScript Execution via Client-Side eval() Sinks
    Critical · 10.0 CVE-2026-40911 <= 29.0 no fix
  20. WWBN AVideo has a Path Traversal in Locale Save Endpoint Enables Arbitrary PHP File Write to Any Web-Accessible Directory (RCE)
    High · 8.7 CVE-2026-40909 <= 29.0 no fix
  21. WWBN AVideo has an Allowlisted downloadURL media extensions bypass SSRF protection and enable internal response exfiltration (Incomplete fix for CVE-2026-27732)
    High · 7.1 CVE-2026-39370 <= 26.0 no fix
  22. WWBN AVideo's GIF poster fetch bypasses traversal scrubbing and exposes local files through public media URLs
    High · 7.6 CVE-2026-39369 <= 26.0 no fix
  23. AVideo: Unauthenticated Live Stream Termination via RTMP Callback on_publish_done.php
    High · 7.5 CVE-2026-34731 <= 26.0 no fix
  24. AVideo's CSRF on Admin Plugin Configuration Enables Payment Credential Hijacking
    High · 8.1 CVE-2026-34394 <= 26.0 no fix
  25. AVideo Vulnerable to Reflected XSS via Unsanitized plugin Parameter in YPTWallet Stripe Payment Page
    High · 8.2 CVE-2026-34375 <= 26.0 no fix
  26. AVideo: Unauthenticated Access to Payment Log DataTables Endpoints Exposes Transaction Data, PayPal Tokens, and User Financial Records
    High · 7.5 CVE-2026-56341 <= 26.0 no fix
  27. AVideo has Plaintext Video Password Storage
    Critical CVE-2026-33867 <= 26.0 no fix
  28. AVideo has SQL Injection in category.php fixCleanTitle() via Unparameterized clean_title and id Variables
    High CVE-2026-33770 <= 26.0 no fix
  29. AVideo has SQL Injection via Partial Prepared Statement — videos_id Concatenated Directly into Query
    High CVE-2026-33767 < 26.0 26.0
  30. AVideo is Vulnerable to SQL Injection through Subscribe Endpoint via Unsanitized user_id Parameter
    High · 7.1 CVE-2026-33723 <= 26.0 no fix
  31. AVideo: Unauthenticated CDN Configuration Takeover via Empty Default Key Bypass and Mass-Assignment
    High · 8.6 CVE-2026-33719 <= 26.0 no fix
  32. AVideo: Remote Code Execution via PHP Temp File in Encoder downloadURL
    High · 8.8 CVE-2026-33717 <= 26.0 no fix
  33. AVideo Allows Unauthenticated Live Stream Control via Token Verification URL Override in control.json.php
    Critical · 9.4 CVE-2026-33716 <= 26.0 no fix
  34. AVideo has Path Traversal in pluginRunDatabaseScript.json.php Enables Arbitrary SQL File Execution via Unsanitized Plugin Name
    High · 7.2 CVE-2026-33681 <= 26.0 no fix
  35. AVideo has a Blind SQL Injection in Live Schedule Reminder via Unsanitized live_schedule_id in Scheduler_commands::getAllActiveOrToRepeat()
    High · 8.1 CVE-2026-33651 <= 26.0 no fix
  36. AVideo: Video Moderator Privilege Escalation via Ownership Transfer Enables Arbitrary Video Deletion
    High · 7.6 CVE-2026-33650 <= 26.0 no fix
  37. AVideo's GET-Based CSRF in setPermission.json.php Enables Privilege Escalation via Arbitrary Permission Modification
    High · 8.1 CVE-2026-33649 <= 26.0 no fix
  38. AVideo Vulnerable to OS Command Injection via Unsanitized `users_id` and `liveTransmitionHistory_id` in Restreamer Log File Path
    High · 8.8 CVE-2026-33648 <= 26.0 no fix
  39. AVideo Vulnerable to Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload
    High · 8.8 CVE-2026-33647 <= 26.0 no fix
  40. AVideo has an Unauthenticated Local File Inclusion in API locale (RCE possible with writable PHP)
    High · 8.6 CVE-2026-33513 <= 26.0 no fix
  41. AVideo has an unauthenticated decrypt oracle leaking any ciphertext
    High · 7.5 CVE-2026-33512 <= 26.0 no fix
  42. AVideo Affected by CSRF on Plugin Import Endpoint Enables Unauthenticated Remote Code Execution via Malicious Plugin Upload
    High · 8.8 CVE-2026-33507 <= 26.0 no fix
  43. AVideo has Unauthenticated SSRF via plugin/Live/test.php
    Critical · 9.3 CVE-2026-33502 <= 26.0 no fix
  44. AVideo has a Path Traversal in import.json.php Allows Private Video Theft and Arbitrary File Read/Deletion via fileURI Parameter
    High · 7.1 CVE-2026-33493 <= 26.0 no fix
  45. AVideo has Session Fixation via GET PHPSESSID Parameter With Disabled Login Session Regeneration
    High · 7.3 CVE-2026-33492 <= 26.0 no fix
  46. AVideo has a PGP 2FA Bypass via Cryptographically Broken 512-bit RSA Key Generation in LoginControl Plugin
    High · 7.4 CVE-2026-33488 <= 26.0 no fix
  47. AVideo has an Unauthenticated Blind SQL Injection in RTMP on_publish Callback via Stream Name Parameter
    High · 7.5 CVE-2026-33485 <= 26.0 no fix
  48. AVideo Affected by Unauthenticated Disk Space Exhaustion via Unlimited Temp File Creation in aVideoEncoderChunk.json.php
    High · 7.5 CVE-2026-33483 <= 26.0 no fix
  49. AVideo has an OS Command Injection via $() Shell Substitution Bypass in sanitizeFFmpegCommand()
    High · 8.1 CVE-2026-33482 <= 26.0 no fix
  50. AVideo has a SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses in Unauthenticated LiveLinks Proxy
    High · 8.6 CVE-2026-33480 <= 26.0 no fix
  51. AVideo has PHP Code Injection via eval() in Gallery saveSort.json.php Exploitable Through CSRF Against Admin
    High · 8.8 CVE-2026-33479 <= 26.0 no fix
  52. AVideo Multi-Chain Attack: Unauthenticated Remote Code Execution via Clone Key Disclosure, Database Dump, and Command Injection
    Critical · 10.0 CVE-2026-33478 <= 26.0 no fix
  53. AVideo has an authenticated arbitrary local file read via `chunkFile` path injection in `aVideoEncoder.json.php`
    High · 7.6 CVE-2026-33354 <= 26.0 no fix
  54. AVideo has an Unauthenticated SQL Injection via `doNotShowCats` Parameter (Backslash Escape Bypass)
    Critical · 9.8 CVE-2026-33352 <= 26.0 no fix
  55. AVideo has Unauthenticated SSRF via `webSiteRootURL` Parameter in saveDVR.json.php, Chaining to Verification Bypass
    Critical · 9.1 CVE-2026-33351 <= 26.0 no fix
  56. AVideo Affected by Stored XSS via Unescaped Video Title in CDN downloadButtons.php
    High CVE-2026-33295 <= 25.0 no fix
  57. AVideo Affected by Arbitrary File Deletion via Path Traversal in CloneSite deleteDump Parameter
    High · 8.1 CVE-2026-33293 <= 25.0 no fix
  58. AVideo has an Authorization Bypass via Path Traversal in HLS Endpoint Allows Streaming Private/Paid Videos
    High · 7.5 CVE-2026-33292 <= 25.0 no fix
  59. AVideo vulnerable to unauthenticated SSRF via HTTP redirect bypass in LiveLinks proxy
    High · 8.6 CVE-2026-33039 <= 25.0 no fix
  60. AVideo affected by Session Hijacking via Unauthenticated Session ID Disclosure with Permissive CORS
    High · 8.1 CVE-2026-33043 <= 25.0 no fix
  61. AVideo affected by unauthenticated application takeover via exposed web installer on uninitialized deployments
    High · 8.1 CVE-2026-33038 <= 25.0 no fix
  62. AVideo: Unauthenticated PHP session store exposed to host network via published memcached port
    High · 8.1 CVE-2026-29093 <= 21.0 no fix
  63. WWBN AVideo is vulnerable to unauthenticated OS Command Injection via base64Url in objects/getImage.php
    Critical · 9.8 CVE-2026-29058 < 7.0.0 7.0.0
  64. AVideo has Authenticated Remote Code Execution via Unsafe Plugin ZIP Extraction
    Critical CVE-2026-28502 all versions no fix
  65. AVideo has Unauthenticated SQL Injection via JSON Request Bypass in objects/videos.json.php
    Critical · 9.8 CVE-2026-28501 <= 21.0.0 no fix
  66. AVideo has Authenticated Server-Side Request Forgery via downloadURL in aVideoEncoder.json.php
    High · 8.1 CVE-2026-27732 < 22.0 22.0
  67. AVideo has Stored Cross-Site Scripting via Markdown Comment Injection this entry
    Medium CVE-2026-27568 < 21.0 21.0
  68. WWBN AVideo Remote Code Execution
    Critical · 9.8 CVE-2024-31819 >= 12.4, < 14.3 14.3
  69. WWBN AVideo Insufficient Entropy vulnerbaility
    Critical · 9.8 CVE-2023-49599 <= 12.4 no fix
  70. WWBN AVideo Improper Restriction of Excessive Authentication Attempts vulnerability
    High · 7.3 CVE-2023-49810 <= 12.4 no fix
  71. WWBN AVideo command injection vulnerability
    High · 8.8 CVE-2023-32073 <= 12.4 no fix
  72. WWBN/AVideo stored XSS vulnerability leads to takeover of any user's account, including admin's account
    High · 8.0 CVE-2023-30860 < 12.4 12.4
  73. Remote code injection in wwbn/avideo
    High · 8.8 CVE-2023-30854 < 12.4 12.4
  74. Cross site scripting (XSS) in wwbn/avideo
    High ghsa-2fch-hv74-fgw9 < 12.4 12.4
  75. AVideo contains Command injection when embedding a video link
    Critical · 9.6 CVE-2023-25313 < 12.4 12.4
  76. AVideo vulnerable to Improper Privilege Management
    High · 8.8 CVE-2020-23489 < 8.9 8.9

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