Advisory details:
github_osv / GHSA-c8h8-vq34-9fw2
| Advisory ID | github_osv/GHSA-c8h8-vq34-9fw2 |
| Aliases |
CVE-2026-47694
|
| Summary | WWBN AVideo: Stored XSS via unescaped Gallery category description ### Summary AVideo stores category descriptions from user input and later renders `category_description` as raw HTML in the Gallery view. A user who can create or edit categories can store JavaScript in a category description, which executes when another user views the affected Gallery/category page. This is a stored XSS in the category `description` field, separate from previously fixed XSS issues in video titles or comments. ### Details Source: `objects/categoryAddNew.json.php` ```php $objCat->setDescription($_POST['description']); Storage setter: objects/category.php public function setDescription($description) { $this->description = $description; } ``` Sink: `plugin/Gallery/view/mainAreaCategory.php` ``` <div id="categoryDescription<?php echo $duid; ?>" style="display: none;"><?php echo $videos[0]['category_description']; ?></div> ``` The value is rendered without `htmlspecialchars()`, `htmlentities()`, `HTMLPurifier`, or equivalent output encoding. ### PoC Prerequisites: - AVideo current master / v29.0 - User account with permission to create or edit categories - Gallery plugin/view enabled - At least one video assigned to the affected category Steps: 1. Log in as a user who can create or edit categories. 2. Create or edit a category. 3. Set the category description to: ``` <img src=x onerror=alert(document.domain)> ``` 4. Save the category. 5. Assign at least one video to that category. 6. Open the Gallery/category page that renders the category section. 7. The payload is inserted into the page as raw HTML and JavaScript executes. ### Impact An attacker with category edit permission can execute JavaScript in the browser of users or administrators who view the affected Gallery/category page. This can be used to perform actions as the victim, steal same-origin data accessible to JavaScript, or abuse administrative UI actions if an administrator views the malicious category. ### Recommended fix - Sanitize category descriptions on input with the same HTML policy used for video descriptions, or store plain text only. - Encode on output: ```php echo htmlspecialchars($videos[0]['category_description'], ENT_QUOTES, 'UTF-8'); ``` - If limited HTML is intended, run the description through HTMLPurifier before storage or before render. - Add regression tests for category description rendering in Gallery views. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 4.9 |
| Risk | 2.5 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 5.4 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c8h8-vq34-9fw2/GHSA-c8h8-vq34-9fw2.json |
| generic_textual | MODERATE |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/WWBN/AVideo | ||
| https://github.com/WWBN/AVideo/commit/6a6ff1f5bff1904f91f612db9f0da083295392b1 | ||
| CVE-2026-47694 | https://nvd.nist.gov/vuln/detail/CVE-2026-47694 | |
| GHSA-c8h8-vq34-9fw2 | Other | https://github.com/WWBN/AVideo/security/advisories/GHSA-c8h8-vq34-9fw2 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-30T02:29:09Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/47xxx/CVE-2026-47694.json
Source Advisory: vulnrichment/CVE-2026-47694
[{'Exploitation': 'poc'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]