CVE-2026-50182 (GCVE-0-2026-50182)

Vulnerability from cvelistv5 – Published: 2026-07-15 21:04 – Updated: 2026-07-17 12:34

Title

AVideo Has Unauthenticated Reflected XSS via $_GET['search'] in YouTubeAPI Gallery Pagination

Summary

WWBN AVideo is an open source video platform. Versions prior to 29.0 contain an unauthenticated Reflected XSS vulnerability through AVideo YouTubeAPI Gallery Pagination. The $_GET['search'] query parameter is concatenated directly into the href attribute of two pagination links in plugin/YouTubeAPI/gallerySection.php (lines 67 and 74) with no htmlspecialchars, no urlencode, and no allow-list check. An injected <script> element is then extracted by the AVideo Layout plugin and concatenated into a single trailing inline script block at the bottom of the page, where the browser executes it. Any unauthenticated attacker can lure a victim into following a crafted URL to execute arbitrary JavaScript under the AVideo origin, which can read non-HttpOnly cookies and issue authenticated AJAX requests as the victim, and when the victim is an administrator, it can perform any cookie-authenticated admin action (create user, promote to admin, change configuration, install plugin), escalating a single click into full administrative takeover. This issue has been patched by this commit: https://github.com/WWBN/AVideo/commit/f50fc033b7adb36f1ffd6640e7826468bdafdec3.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-17 12:34 UTC

CWE

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

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7613 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/WWBN/AVideo/security/advisorie…	x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/f50fc033b7a…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
WWBN	AVideo	Affected: <= 29.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-50182

Vulnerability from fkie_nvd - Published: 2026-07-15 22:16 - Updated: 2026-07-17 13:18

Severity

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/WWBN/AVideo/commit/f50fc033b7adb36f1ffd6640e7826468bdafdec3
	security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-hgjh-6wj8-gcgf
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-hgjh-6wj8-gcgf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-HGJH-6WJ8-GCGF

Vulnerability from github – Published: 2026-06-04 18:55 – Updated: 2026-06-04 18:55

Summary

WWBN AVideo: Unauthenticated Reflected XSS via $_GET['search'] in AVideo YouTubeAPI Gallery Pagination

Details

Unauthenticated Reflected XSS via `$_GET['search']` in AVideo YouTubeAPI Gallery Pagination

Summary

A reflected Cross-Site Scripting vulnerability (CWE-79) in the AVideo YouTubeAPI plugin allows any unauthenticated attacker to execute arbitrary JavaScript in a victim's browser session when the victim follows a crafted URL. The $_GET['search'] query parameter is concatenated directly into the href attribute of two pagination links in plugin/YouTubeAPI/gallerySection.php (lines 67 and 74) with no htmlspecialchars, no urlencode, and no allow-list check. An injected <script> element is then extracted by the AVideo Layout plugin and concatenated into a single trailing inline script block at the bottom of the page, where the browser executes it.

Details

plugin/YouTubeAPI/gallerySection.php renders the YouTubeAPI plugin's gallery section on the AVideo homepage (and every page that includes plugin/Gallery/view/mainArea.php) when the API plugin is enabled with showGallerySection=true (the default). The pagination block at lines 67 and 74 builds the previous-page and next-page <a> elements by string-interpolating $_GET['search'] directly:

// plugin/YouTubeAPI/gallerySection.php:67
<a href="<?php echo "{$global['webSiteRootURL']}page/".($_GET['page']-1)."?pageToken={$object->prevPageToken}&search=".(@$_GET['search']); ?>" ...>

// plugin/YouTubeAPI/gallerySection.php:74
<a href="<?php echo "{$global['webSiteRootURL']}page/".($_GET['page']+1)."?pageToken={$object->nextPageToken}&search=".(@$_GET['search']); ?>" ...>

The @ operator only suppresses an undefined-index warning; it does not sanitize the value. A payload like "><script>alert(1337)</script> closes the href attribute, closes the <a> element, and injects a fresh <script> tag.

Two preconditions gate the sink. First, the YouTube API call must return a pagination token (always true for any non-trivial result set, since the mock or real YouTube response carries nextPageToken for multi-page queries). Second, plugin/Gallery/view/mainArea.php line 53 wraps the gallery render in if (!empty($video)) { echo AVideoPlugin::getGallerySection(); } else { /* output captured and discarded */ }. When $_GET['search'] is set, Video::getVideo() adds a MySQL fulltext MATCH(v.title) AGAINST (<search>) IN NATURAL LANGUAGE MODE clause; the payload tokenizes to words like script, alert, 1337, and the gate passes whenever any video in the corpus has a title containing one of those words. Realistic deployments overwhelmingly satisfy this; the attacker can also seed the payload with a common word (?search=video"><script>...</script>) to guarantee a fulltext hit.

The AVideo Layout plugin (plugin/Layout/Layout.php:611, enabled by default) runs Layout::organizeHTML() over the final HTML, extracts every inline <script[^>]*>(.*)</script> block via regex, and concatenates their inner contents into one trailing <script> block placed immediately before </body>. The injected <script>alert(1337)</script> is therefore moved out of the original href context and into a clean executable script block; the visible pagination markup retains only the leftover &search="> bytes.

Affected product: AVideo (WWBN), API + YouTubeAPI + Layout plugins Tested version: master branch, commit 122b184 (snapshot dated 2026-05-22)

PoC

The AVideo deployment must have the YouTubeAPI plugin enabled with the default showGallerySection=true. The payload also needs to satisfy the fulltext MATCH(v.title) AGAINST gate that Video::getVideo() adds when $_GET['search'] is set: at least one video in the corpus must have a title containing one of the payload's tokens. In the live confirmation a video titled Tutorial about script error alerts satisfied the gate via the words script and alert. Seeding the payload with the common word video guarantees a hit on any realistic AVideo deployment, since video appears in nearly every video title.

Open the following URL in any browser. No authentication, no session cookie, no prior interaction with the site is required:

https://avideo.example/?search=video%22%3E%3Cscript%3Ealert(1337)%3C%2Fscript%3E&page=2

The browser fires an alert(1337) modal dialog as soon as the homepage finishes rendering. The injected <script> is no longer inside the href markup at render time; it lives inside the page's single trailing inline script block, surfaced there by the Layout plugin's HTML reorganization.

Impact

This is a Reflected XSS vulnerability (CWE-79) on the AVideo public homepage. Any unauthenticated remote attacker who induces a victim to follow a crafted URL executes arbitrary JavaScript in the victim's browser session under the AVideo origin, reading non-HttpOnly cookies and issuing authenticated AJAX requests as the victim. When the victim is an AVideo administrator, the injected JavaScript performs any admin action (create user, promote to admin, change configuration, install plugin) that uses cookie-based authentication without an additional CSRF token, escalating a single click on a crafted link into full administrative takeover.

Severity

6.1 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "WWBN/AVideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "29.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50182"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T18:55:58Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "# Unauthenticated Reflected XSS via `$_GET[\u0027search\u0027]` in AVideo YouTubeAPI Gallery Pagination\n\n## Summary\n\nA reflected Cross-Site Scripting vulnerability (CWE-79) in the AVideo YouTubeAPI plugin allows any unauthenticated attacker to execute arbitrary JavaScript in a victim\u0027s browser session when the victim follows a crafted URL. The `$_GET[\u0027search\u0027]` query parameter is concatenated directly into the `href` attribute of two pagination links in `plugin/YouTubeAPI/gallerySection.php` (lines 67 and 74) with no `htmlspecialchars`, no `urlencode`, and no allow-list check. An injected `\u003cscript\u003e` element is then extracted by the AVideo Layout plugin and concatenated into a single trailing inline script block at the bottom of the page, where the browser executes it.\n\n## Details\n\n`plugin/YouTubeAPI/gallerySection.php` renders the YouTubeAPI plugin\u0027s gallery section on the AVideo homepage (and every page that includes `plugin/Gallery/view/mainArea.php`) when the API plugin is enabled with `showGallerySection=true` (the default). The pagination block at lines 67 and 74 builds the previous-page and next-page `\u003ca\u003e` elements by string-interpolating `$_GET[\u0027search\u0027]` directly:\n\n```php\n// plugin/YouTubeAPI/gallerySection.php:67\n\u003ca href=\"\u003c?php echo \"{$global[\u0027webSiteRootURL\u0027]}page/\".($_GET[\u0027page\u0027]-1).\"?pageToken={$object-\u003eprevPageToken}\u0026search=\".(@$_GET[\u0027search\u0027]); ?\u003e\" ...\u003e\n\n// plugin/YouTubeAPI/gallerySection.php:74\n\u003ca href=\"\u003c?php echo \"{$global[\u0027webSiteRootURL\u0027]}page/\".($_GET[\u0027page\u0027]+1).\"?pageToken={$object-\u003enextPageToken}\u0026search=\".(@$_GET[\u0027search\u0027]); ?\u003e\" ...\u003e\n```\n\nThe `@` operator only suppresses an undefined-index warning; it does not sanitize the value. A payload like `\"\u003e\u003cscript\u003ealert(1337)\u003c/script\u003e` closes the `href` attribute, closes the `\u003ca\u003e` element, and injects a fresh `\u003cscript\u003e` tag.\n\nTwo preconditions gate the sink. First, the YouTube API call must return a pagination token (always true for any non-trivial result set, since the mock or real YouTube response carries `nextPageToken` for multi-page queries). Second, `plugin/Gallery/view/mainArea.php` line 53 wraps the gallery render in `if (!empty($video)) { echo AVideoPlugin::getGallerySection(); } else { /* output captured and discarded */ }`. When `$_GET[\u0027search\u0027]` is set, `Video::getVideo()` adds a MySQL fulltext `MATCH(v.title) AGAINST (\u003csearch\u003e) IN NATURAL LANGUAGE MODE` clause; the payload tokenizes to words like `script`, `alert`, `1337`, and the gate passes whenever any video in the corpus has a title containing one of those words. Realistic deployments overwhelmingly satisfy this; the attacker can also seed the payload with a common word (`?search=video\"\u003e\u003cscript\u003e...\u003c/script\u003e`) to guarantee a fulltext hit.\n\nThe AVideo Layout plugin (`plugin/Layout/Layout.php:611`, enabled by default) runs `Layout::organizeHTML()` over the final HTML, extracts every inline `\u003cscript[^\u003e]*\u003e(.*)\u003c/script\u003e` block via regex, and concatenates their inner contents into one trailing `\u003cscript\u003e` block placed immediately before `\u003c/body\u003e`. The injected `\u003cscript\u003ealert(1337)\u003c/script\u003e` is therefore moved out of the original `href` context and into a clean executable script block; the visible pagination markup retains only the leftover `\u0026search=\"\u003e` bytes.\n\n**Affected product:** AVideo (WWBN), API + YouTubeAPI + Layout plugins\n**Tested version:** master branch, commit 122b184 (snapshot dated 2026-05-22)\n\n## PoC\n\nThe AVideo deployment must have the YouTubeAPI plugin enabled with the default `showGallerySection=true`. The payload also needs to satisfy the fulltext `MATCH(v.title) AGAINST` gate that `Video::getVideo()` adds when `$_GET[\u0027search\u0027]` is set: at least one video in the corpus must have a title containing one of the payload\u0027s tokens. In the live confirmation a video titled `Tutorial about script error alerts` satisfied the gate via the words `script` and `alert`. Seeding the payload with the common word `video` guarantees a hit on any realistic AVideo deployment, since `video` appears in nearly every video title.\n\nOpen the following URL in any browser. No authentication, no session cookie, no prior interaction with the site is required:\n\n```\nhttps://avideo.example/?search=video%22%3E%3Cscript%3Ealert(1337)%3C%2Fscript%3E\u0026page=2\n```\n\nThe browser fires an `alert(1337)` modal dialog as soon as the homepage finishes rendering. The injected `\u003cscript\u003e` is no longer inside the `href` markup at render time; it lives inside the page\u0027s single trailing inline script block, surfaced there by the Layout plugin\u0027s HTML reorganization.\n\n## Impact\n\nThis is a Reflected XSS vulnerability (CWE-79) on the AVideo public homepage. Any unauthenticated remote attacker who induces a victim to follow a crafted URL executes arbitrary JavaScript in the victim\u0027s browser session under the AVideo origin, reading non-`HttpOnly` cookies and issuing authenticated AJAX requests as the victim. When the victim is an AVideo administrator, the injected JavaScript performs any admin action (create user, promote to admin, change configuration, install plugin) that uses cookie-based authentication without an additional CSRF token, escalating a single click on a crafted link into full administrative takeover.",
  "id": "GHSA-hgjh-6wj8-gcgf",
  "modified": "2026-06-04T18:55:58Z",
  "published": "2026-06-04T18:55:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-hgjh-6wj8-gcgf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/f50fc033b7adb36f1ffd6640e7826468bdafdec3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "WWBN AVideo: Unauthenticated Reflected XSS via $_GET[\u0027search\u0027] in AVideo YouTubeAPI Gallery Pagination"
}

Sightings

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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.

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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.
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Action not permitted

CVE-2026-50182 (GCVE-0-2026-50182)

FKIE_CVE-2026-50182

GHSA-HGJH-6WJ8-GCGF

Unauthenticated Reflected XSS via $_GET['search'] in AVideo YouTubeAPI Gallery Pagination

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Unauthenticated Reflected XSS via `$_GET['search']` in AVideo YouTubeAPI Gallery Pagination