# CVE-2025-63523: FeehiCMS fails to enforce server-side immutability

Source: https://junglewise.ai/threats/cve-2025-63523-feehicms-fails-to-enforce-server-side-immutability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-01  
License: CC BY 4.0 with a link back

CVE-2025-63523 · Severity: medium · CVSS 6.5 · Published 2025-12-01

FeehiCMS version 2.1.1 fails to enforce server-side immutability for parameters that are presented to clients as "read-only." An authenticated attacker can intercept and modify the parameter in transit and the backend accepts the changes. This can lead to unintended username changes.

Technologies: [Feehicms](https://junglewise.ai/threats/technologies/feehi-feehicms-1), [feehi/feehicms (Packagist)](https://junglewise.ai/threats/technologies/feehi-feehicms). Vendors: [Feehi](https://junglewise.ai/threats/vendors/feehi), [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2025-63523 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-63523 being exploited in the wild.

**How severe is CVE-2025-63523?** Medium severity, with a CVSS score of 6.5, published 1 December 2025.

**Which products and versions are affected?** Feehicms, feehi/feehicms (Packagist). The advisory does not name versions.

**Is there a fix for CVE-2025-63523?** 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.

**Am I affected by CVE-2025-63523?** Check whether you run Feehicms or feehi/feehicms (Packagist). 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.

## Affected products

- Feehicms
- feehi/feehicms (Packagist)

## Identifiers

- CVE-2025-63523
- GHSA-qgc9-p7cj-jvh6

## Related threats

- [FeehiCMS Has a Remote Code Execution via Unrestricted File Upload in Ad Management](https://junglewise.ai/threats/cve-2025-65657-feehicms-has-a-remote-code-execution-via-unrestricted-file-upload)
- [Reverse Tabnabbing vulnerability in FeehiCMS 2.1.1 in the Comments Management function](https://junglewise.ai/threats/cve-2025-63522-feehicms-is-vulnerable-to-reverse-tabnabbing)
- [Cross Site Scripting (XSS) vulnerability in FeehiCMS 2.1.1 via the id parameter of the User Update function (?r=user%2Fupdate).](https://junglewise.ai/threats/cve-2025-63520-feehicms-is-vulnerable-to-cross-site-scripting-via-the-id)
- [FeehiCMS Cross Site Scripting vulnerability](https://junglewise.ai/threats/cve-2021-36572-feehicms-cross-site-scripting-vulnerability)
- [FeehiCMS Cross Site Scripting vulnerability](https://junglewise.ai/threats/cve-2022-40000-feehicms-cross-site-scripting-vulnerability)