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CVE-2025-57520

Published Unknown
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Expert Analysis

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CVSS Score

V3.1
0.0
/10
Not Available
Base Score Metrics
Exploitability: N/A Impact: N/A

Attack Vector Metrics

Attack Vector
Not Available
Attack Complexity
Not Available
Privileges Required
Not Available
User Interaction
Not Available
Scope
Not Available

Impact Metrics

Confidentiality
Not Available
Integrity
Not Available
Availability
Not Available

Description

A Cross Site Scripting (XSS) vulnerability exists in Decap CMS thru 3.8.3. Input fields such as body, tags, title, and description are not properly sanitized before being rendered in the content preview pane. This enables an attacker to inject arbitrary JavaScript which executes whenever a user views the preview panel. The vulnerability affects multiple input vectors and does not require user interaction beyond viewing the affected content.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Unknown Vendor

Unknown Product

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

Not EU Coordinated

Exploitation Status

No Known Exploitation

EUVD ID

View on ENISA

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

n/a
n/a

ENISA Scoring

CVSS Score (3.1)

6.1
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Score

0.010
probability

ENISA References

https://onurcangenc.com.tr/blog/decap-cms-xss-analysis
https://github.com/decaporg/decap-cms
https://onurcangenc.com.tr/posts/cve-2025-57520--stored-xss-in-decap-cms-3-8-3/
https://nvd.nist.gov/vuln/detail/CVE-2025-57520

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Decap CMS Cross Site Scripting (XSS) vulnerability

GHSA-xp8g-32qh-mv28

Advisory Details

Decap CMS through 3.8.3 is vulnerable to stored Cross-Site Scripting (XSS) in the admin preview pane. User-controlled fields (e.g., title, description, tags, and body) are rendered in the preview without sufficient sanitization/escaping. An attacker with low-privilege author/contributor access can persist a JavaScript payload in content; when a maintainer or reviewer opens the preview, the payload executes in the CMS admin origin, enabling token/session theft or the execution of privileged actions via the DOM. The issue affects multiple input vectors and requires only passive interaction from the previewing user. As no patched version is available, administrators should restrict untrusted contributor roles and filter or disable preview rendering of untrusted HTML.

Affected Packages

npm decap-cms
ECOSYSTEM: ≥0 ≤3.8.3

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-57520
PACKAGE https://github.com/decaporg/decap-cms
WEB https://onurcangenc.com.tr/posts/cve-2025-57520--stored-xss-in-decap-cms-3-8-3

Advisory provided by GitHub Security Advisory Database. Published: September 10, 2025, Modified: September 23, 2025

Published: Unknown
Last Modified: Unknown
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