Vulnerability-Lookup

CVE-2026-41061 (GCVE-0-2026-41061)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:49 – Updated: 2026-04-22 13:14

Title

WWBN AVideo Vulnerable to stored XSS via Unanchored Duration Regex in Video Encoder Receiver

Summary

WWBN AVideo is an open source video platform. In versions 29.0 and below, the `isValidDuration()` regex at `objects/video.php:918` uses `/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/` without a `$` end anchor, allowing arbitrary HTML/JavaScript to be appended after a valid duration prefix. The crafted duration is stored in the database and rendered without HTML escaping via `echo Video::getCleanDuration()` on trending pages, playlist pages, and video gallery thumbnails, resulting in stored cross-site scripting. Commit bcba324644df8b4ed1f891462455f1cd26822a45 contains a fix.

Severity

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/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 2026-04-22 13:14 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 7681 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/bcba324644d…	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-2026-41061

Vulnerability from fkie_nvd - Published: 2026-04-21 23:16 - Updated: 2026-06-17 10:46

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/bcba324644df8b4ed1f891462455f1cd26822a45	Patch
security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-8pv3-29pp-pf8f	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-8pv3-29pp-pf8f	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	wwbn	avideo	*

JSON

To clipboard

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      "affectedData": [
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          "product": "AVideo",
          "vendor": "WWBN",
          "versions": [
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            }
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    }
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    }
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}

GHSA-8PV3-29PP-PF8F

Vulnerability from github – Published: 2026-04-14 23:22 – Updated: 2026-04-24 20:41

Summary

WWBN AVideo has Stored XSS via Unanchored Duration Regex in Video Encoder Receiver

Details

Summary

The isValidDuration() regex at objects/video.php:918 uses /^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/ without a $ end anchor, allowing arbitrary HTML/JavaScript to be appended after a valid duration prefix. The crafted duration is stored in the database and rendered without HTML escaping via echo Video::getCleanDuration() on trending pages, playlist pages, and video gallery thumbnails, resulting in stored cross-site scripting.

Details

Input entry point: objects/aVideoEncoderReceiveImage.json.php:208

// Line 203-211
if (!empty($_REQUEST['duration'])) {
    $video->setDuration($_REQUEST['duration']);
}

Insufficient validation: objects/video.php:918

static function isValidDuration($duration) {
    // ...
    return preg_match('/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/', $duration);
    //     Missing $ anchor here -----------------------------------^
}

The regex matches 00:00:01 at the start of the string but ignores everything after it. A payload like 00:00:01</time><img src=x onerror=alert(1)><time> passes validation.

No sanitization in output function: objects/video.php:3463-3480

public static function getCleanDuration($duration = "") {
    $durationParts = explode(".", $duration);
    $duration = $durationParts[0];
    $durationParts = explode(':', $duration);
    if (count($durationParts) == 1) {
        return '0:00:' . static::addZero($durationParts[0]);
    } elseif (count($durationParts) == 2) {
        return '0:' . static::addZero($durationParts[0]) . ':' . static::addZero($durationParts[1]);
    }
    return $duration; // Returns full string unmodified for 3+ colon parts
}

With the payload 00:00:01</time><img src=x onerror=alert(1)><time>, exploding by : yields 3+ parts, so the full unsanitized string is returned.

Unescaped output sinks:

view/trending.php:72:

<time class="duration"><?php echo Video::getCleanDuration($value['duration']); ?></time>

view/include/playlist.php:159:

<time class="duration"><?php echo Video::getCleanDuration(@$value['duration']); ?></time>

objects/video.php:7200 (gallery thumbnail generation):

$img .= "<time class=\"duration\"...>" . $duration . "</time>";

No Content-Security-Policy headers are set. The application uses raw PHP templates with no auto-escaping framework.

PoC

Authenticate as a user with upload permission and obtain a video_id_hash for a video (visible in encoder API responses or via the upload flow).
Send the malicious duration:

curl -X POST "https://target/objects/aVideoEncoderReceiveImage.json.php" \
  -d "videos_id=VIDEO_ID" \
  -d "video_id_hash=HASH" \
  -d 'duration=00:00:01</time><img src=x onerror=alert(document.cookie)><time>'

The isValidDuration() regex matches the 00:00:01 prefix and allows the full string to be stored.
Visit the trending page (/view/trending.php) or any playlist containing the poisoned video. The injected HTML breaks out of the <time> tag and the onerror handler executes JavaScript in the victim's browser context.

Impact

Session hijacking: Attacker can steal session cookies of any user (including administrators) who views a page listing the poisoned video (trending, playlists, search results, channel pages).
Account takeover: Stolen admin session cookies grant full platform control.
Phishing: Attacker can inject fake login forms or redirect users to malicious sites.
Worm potential: Since the XSS fires on commonly-visited listing pages (trending), it can propagate without targeted delivery — any visitor is a victim.

The attack requires only upload-level permissions (low privilege) and impacts all users who view any page rendering the poisoned video's duration (high blast radius).

Recommended Fix

Fix 1 — Anchor the regex (objects/video.php:918):

- return preg_match('/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/', $duration);
+ return preg_match('/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}(\.[0-9]+)?$/', $duration);

Fix 2 — HTML-escape all duration output (defense in depth):

In view/trending.php:72:

- <time class="duration"><?php echo Video::getCleanDuration($value['duration']); ?></time>
+ <time class="duration"><?php echo htmlspecialchars(Video::getCleanDuration($value['duration']), ENT_QUOTES, 'UTF-8'); ?></time>

In view/include/playlist.php:159:

- <time class="duration"><?php echo Video::getCleanDuration(@$value['duration']); ?></time>
+ <time class="duration"><?php echo htmlspecialchars(Video::getCleanDuration(@$value['duration']), ENT_QUOTES, 'UTF-8'); ?></time>

In objects/video.php:7200:

- $img .= "<time class=\"duration\"...>" . $duration . "</time>";
+ $img .= "<time class=\"duration\"...>" . htmlspecialchars($duration, ENT_QUOTES, 'UTF-8') . "</time>";

Both fixes should be applied: the regex fix prevents storage of invalid data, and the output escaping provides defense in depth against any other code path that might store unvalidated durations.

Severity

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/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-2026-41061"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-14T23:22:21Z",
    "nvd_published_at": "2026-04-21T23:16:21Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nThe `isValidDuration()` regex at `objects/video.php:918` uses `/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/` without a `$` end anchor, allowing arbitrary HTML/JavaScript to be appended after a valid duration prefix. The crafted duration is stored in the database and rendered without HTML escaping via `echo Video::getCleanDuration()` on trending pages, playlist pages, and video gallery thumbnails, resulting in stored cross-site scripting.\n\n## Details\n\n**Input entry point:** `objects/aVideoEncoderReceiveImage.json.php:208`\n\n```php\n// Line 203-211\nif (!empty($_REQUEST[\u0027duration\u0027])) {\n    $video-\u003esetDuration($_REQUEST[\u0027duration\u0027]);\n}\n```\n\n**Insufficient validation:** `objects/video.php:918`\n\n```php\nstatic function isValidDuration($duration) {\n    // ...\n    return preg_match(\u0027/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/\u0027, $duration);\n    //     Missing $ anchor here -----------------------------------^\n}\n```\n\nThe regex matches `00:00:01` at the start of the string but ignores everything after it. A payload like `00:00:01\u003c/time\u003e\u003cimg src=x onerror=alert(1)\u003e\u003ctime\u003e` passes validation.\n\n**No sanitization in output function:** `objects/video.php:3463-3480`\n\n```php\npublic static function getCleanDuration($duration = \"\") {\n    $durationParts = explode(\".\", $duration);\n    $duration = $durationParts[0];\n    $durationParts = explode(\u0027:\u0027, $duration);\n    if (count($durationParts) == 1) {\n        return \u00270:00:\u0027 . static::addZero($durationParts[0]);\n    } elseif (count($durationParts) == 2) {\n        return \u00270:\u0027 . static::addZero($durationParts[0]) . \u0027:\u0027 . static::addZero($durationParts[1]);\n    }\n    return $duration; // Returns full string unmodified for 3+ colon parts\n}\n```\n\nWith the payload `00:00:01\u003c/time\u003e\u003cimg src=x onerror=alert(1)\u003e\u003ctime\u003e`, exploding by `:` yields 3+ parts, so the full unsanitized string is returned.\n\n**Unescaped output sinks:**\n\n1. `view/trending.php:72`:\n```php\n\u003ctime class=\"duration\"\u003e\u003c?php echo Video::getCleanDuration($value[\u0027duration\u0027]); ?\u003e\u003c/time\u003e\n```\n\n2. `view/include/playlist.php:159`:\n```php\n\u003ctime class=\"duration\"\u003e\u003c?php echo Video::getCleanDuration(@$value[\u0027duration\u0027]); ?\u003e\u003c/time\u003e\n```\n\n3. `objects/video.php:7200` (gallery thumbnail generation):\n```php\n$img .= \"\u003ctime class=\\\"duration\\\"...\u003e\" . $duration . \"\u003c/time\u003e\";\n```\n\nNo Content-Security-Policy headers are set. The application uses raw PHP templates with no auto-escaping framework.\n\n## PoC\n\n1. Authenticate as a user with upload permission and obtain a `video_id_hash` for a video (visible in encoder API responses or via the upload flow).\n\n2. Send the malicious duration:\n\n```bash\ncurl -X POST \"https://target/objects/aVideoEncoderReceiveImage.json.php\" \\\n  -d \"videos_id=VIDEO_ID\" \\\n  -d \"video_id_hash=HASH\" \\\n  -d \u0027duration=00:00:01\u003c/time\u003e\u003cimg src=x onerror=alert(document.cookie)\u003e\u003ctime\u003e\u0027\n```\n\n3. The `isValidDuration()` regex matches the `00:00:01` prefix and allows the full string to be stored.\n\n4. Visit the trending page (`/view/trending.php`) or any playlist containing the poisoned video. The injected HTML breaks out of the `\u003ctime\u003e` tag and the `onerror` handler executes JavaScript in the victim\u0027s browser context.\n\n## Impact\n\n- **Session hijacking**: Attacker can steal session cookies of any user (including administrators) who views a page listing the poisoned video (trending, playlists, search results, channel pages).\n- **Account takeover**: Stolen admin session cookies grant full platform control.\n- **Phishing**: Attacker can inject fake login forms or redirect users to malicious sites.\n- **Worm potential**: Since the XSS fires on commonly-visited listing pages (trending), it can propagate without targeted delivery \u2014 any visitor is a victim.\n\nThe attack requires only upload-level permissions (low privilege) and impacts all users who view any page rendering the poisoned video\u0027s duration (high blast radius).\n\n## Recommended Fix\n\n**Fix 1 \u2014 Anchor the regex** (`objects/video.php:918`):\n\n```php\n- return preg_match(\u0027/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}/\u0027, $duration);\n+ return preg_match(\u0027/^[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}(\\.[0-9]+)?$/\u0027, $duration);\n```\n\n**Fix 2 \u2014 HTML-escape all duration output** (defense in depth):\n\nIn `view/trending.php:72`:\n```php\n- \u003ctime class=\"duration\"\u003e\u003c?php echo Video::getCleanDuration($value[\u0027duration\u0027]); ?\u003e\u003c/time\u003e\n+ \u003ctime class=\"duration\"\u003e\u003c?php echo htmlspecialchars(Video::getCleanDuration($value[\u0027duration\u0027]), ENT_QUOTES, \u0027UTF-8\u0027); ?\u003e\u003c/time\u003e\n```\n\nIn `view/include/playlist.php:159`:\n```php\n- \u003ctime class=\"duration\"\u003e\u003c?php echo Video::getCleanDuration(@$value[\u0027duration\u0027]); ?\u003e\u003c/time\u003e\n+ \u003ctime class=\"duration\"\u003e\u003c?php echo htmlspecialchars(Video::getCleanDuration(@$value[\u0027duration\u0027]), ENT_QUOTES, \u0027UTF-8\u0027); ?\u003e\u003c/time\u003e\n```\n\nIn `objects/video.php:7200`:\n```php\n- $img .= \"\u003ctime class=\\\"duration\\\"...\u003e\" . $duration . \"\u003c/time\u003e\";\n+ $img .= \"\u003ctime class=\\\"duration\\\"...\u003e\" . htmlspecialchars($duration, ENT_QUOTES, \u0027UTF-8\u0027) . \"\u003c/time\u003e\";\n```\n\nBoth fixes should be applied: the regex fix prevents storage of invalid data, and the output escaping provides defense in depth against any other code path that might store unvalidated durations.",
  "id": "GHSA-8pv3-29pp-pf8f",
  "modified": "2026-04-24T20:41:06Z",
  "published": "2026-04-14T23:22:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8pv3-29pp-pf8f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41061"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/bcba324644df8b4ed1f891462455f1cd26822a45"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "WWBN AVideo has Stored XSS via Unanchored Duration Regex in Video Encoder Receiver"
}

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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CVE-2026-41061 (GCVE-0-2026-41061)

FKIE_CVE-2026-41061

GHSA-8PV3-29PP-PF8F

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