# CVE-2026-13556: itsourcecode Online Hotel Management System stored XSS in mod_users

Source: https://junglewise.ai/threats/cve-2026-13556-itsourcecode-online-hotel-management-system-stored-xss-in-mod  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-29. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2026-13556 · Severity: medium · CVSS 4.3 · Published 2026-06-29

A vulnerability exists in the Online Hotel Management System, a web application used for managing hotel operations. An attacker can inject malicious scripts into the system's database through the user management interface. If a legitimate user views the affected data, the script could execute in their browser, potentially leading to unauthorized actions, session hijacking, or the theft of sensitive information like login cookies.

Technologies: [Itsourcecode Online Hotel Management System](https://junglewise.ai/threats/technologies/online-hotel-management-system). Vendors: [Itsourcecode](https://junglewise.ai/threats/vendors/itsourcecode).

## Quick answers

**Is CVE-2026-13556 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-13556 being exploited in the wild.

**How severe is CVE-2026-13556?** Medium severity, with a CVSS score of 4.3, published 29 June 2026.

**Which products and versions are affected?** Itsourcecode Online Hotel Management System 1.0.

**Is there a fix for CVE-2026-13556?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-13556 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-13556?** Check whether you run Itsourcecode Online Hotel Management System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in itsourcecode Online Hotel Management System 1.0 within the /admin/mod_users/controller.php file. The application fails to properly sanitize or escape the 'Name' parameter during a POST request handled by the 'edit' action. This allows a remote, unauthenticated attacker to submit a malicious payload (e.g., an img tag with an onerror attribute) that is permanently stored in the 'users' database table. When an administrator or another user views the user list or edit page, the payload executes in their browser context. This can be used to steal session cookies or perform unauthorized actions. No authentication is required to reach the vulnerable endpoint.

## Affected products

- itsourcecode Online Hotel Management System 1.0

## Timeline

- 2026-05-30: disclosed: Initial disclosure on GitHub by researcher Hh-176
- 2026-06-29: advisory: NVD publication date

## References

- [https://github.com/Hh-176/CVE/issues/7](https://github.com/Hh-176/CVE/issues/7)
- [https://itsourcecode.com/](https://itsourcecode.com/)
- [https://vuldb.com/cve/CVE-2026-13556](https://vuldb.com/cve/CVE-2026-13556)
- [https://vuldb.com/submit/843586](https://vuldb.com/submit/843586)
- [https://vuldb.com/vuln/374564](https://vuldb.com/vuln/374564)
- [https://vuldb.com/vuln/374564/cti](https://vuldb.com/vuln/374564/cti)

## Related threats

- [itsourcecode Online Hotel Management System SQL injection in login.php](https://junglewise.ai/threats/cve-2026-14688-itsourcecode-online-hotel-management-system-sql-injection-in)
- [itsourcecode Online Hotel Management System stored XSS in mod_room](https://junglewise.ai/threats/cve-2026-13557-itsourcecode-online-hotel-management-system-stored-xss-in-mod)
- [itsourcecode Online Hotel Management System SQL injection in controller.php](https://junglewise.ai/threats/cve-2026-13555-itsourcecode-online-hotel-management-system-sql-injection-in)
- [itsourcecode Online Hotel Management System stored XSS in controller.php](https://junglewise.ai/threats/cve-2026-13554-itsourcecode-online-hotel-management-system-stored-xss-in)
- [itsourcecode Online Hotel Management System unrestricted upload in mod_amenities](https://junglewise.ai/threats/cve-2026-13553-itsourcecode-online-hotel-management-system-unrestricted-upload)