CVE-2021-47929
Stored XSS in Filterable Portfolio Gallery 1.0
Publication date: 2026-05-10
Last updated on: 2026-05-10
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| akram_ul_haq | filterable_portfolio_gallery | to 1.0 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The stored cross-site scripting (XSS) vulnerability in the Filterable Portfolio Gallery plugin allows attackers to inject malicious JavaScript code that executes when users view the gallery. This can lead to persistent XSS attacks, potentially compromising user sessions or stealing sensitive data.
Such unauthorized access or exposure of sensitive data could negatively impact compliance with data protection regulations like GDPR or HIPAA, which require safeguarding personal and sensitive information against unauthorized access or breaches.
However, the provided information does not explicitly detail the direct impact on compliance with these standards.
Can you explain this vulnerability to me?
The Filterable Portfolio Gallery version 1.0 contains a stored cross-site scripting (XSS) vulnerability. This flaw allows authenticated attackers to inject malicious JavaScript code by entering payloads in the title field of the gallery.
The injected script, such as an image tag with an onerror handler, executes when the gallery is previewed, affecting all users who view the page.
How can this vulnerability impact me? :
This vulnerability can impact you by allowing attackers who have authenticated access to inject malicious JavaScript code into the gallery titles.
When other users view the gallery, the malicious script executes in their browsers, potentially leading to unauthorized actions such as session hijacking, data theft, or other malicious activities.
Since the script runs in the context of the affected website, it can compromise the security and privacy of all users viewing the gallery.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by checking for the presence of malicious JavaScript payloads injected into the title fields of the Filterable Portfolio Gallery plugin version 1.0. Since the vulnerability involves stored cross-site scripting, inspecting the database entries or the gallery titles for suspicious script tags or image tags with onerror handlers is a key detection method.
You can use commands to search for suspicious payloads in the WordPress database, for example by querying the posts or plugin-specific tables where gallery titles are stored.
- Use a MySQL command to search for script tags or onerror attributes in the title fields, such as: SELECT * FROM wp_posts WHERE post_title LIKE '%<script%' OR post_title LIKE '%onerror%';
- Alternatively, use grep on exported database dumps or plugin files to find suspicious JavaScript payloads: grep -i -r --include='*.php' 'onerror' /path/to/wordpress/wp-content/plugins/filterable-portfolio-gallery/
Additionally, monitoring HTTP traffic for unexpected JavaScript execution or unusual payloads in requests related to the gallery preview page can help detect exploitation attempts.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the Filterable Portfolio Gallery plugin to trusted authenticated users only, as the vulnerability requires authentication to inject malicious scripts.
Remove or sanitize any suspicious or malicious payloads found in the title fields of the gallery entries to prevent script execution.
- Disable or uninstall the Filterable Portfolio Gallery plugin version 1.0 until a patch or update is available.
- Implement Web Application Firewall (WAF) rules to block common XSS payloads targeting the gallery preview functionality.
Since the plugin is no longer actively maintained, consider replacing it with a maintained alternative to avoid future vulnerabilities.