CVE-2025-31483— Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration
Quick assessment
Affected
miniflux v2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Miniflux是Miniflux开源的一个极简主义的提要阅读器。 Miniflux存在跨站脚本漏洞，该漏洞源于媒体代理的弱内容安全策略，可能导致跨站脚本。
Possible ATT&CK Techniques 2 AI
T1189 · Drive-by Compromise T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-31483
Vulnerability Information
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Vulnerability Title
Stored XSS in Miniflux Media Proxy due to improper Content-Security-Policy configuration
Source: CVE Program / CVE List V5
Vulnerability Description
Miniflux is a feed reader. Due to a weak Content Security Policy on the /proxy/* route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window. To mitigate the vulnerability, the CSP for the media proxy has been changed from default-src 'self' to default-src 'none'; form-action 'none'; sandbox;. This vulnerability is fixed in 2.2.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Miniflux 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Miniflux是Miniflux开源的一个极简主义的提要阅读器。 Miniflux存在跨站脚本漏洞，该漏洞源于媒体代理的弱内容安全策略，可能导致跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-31483
| # | POC Description | Source Link | Shenlong Link |
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IV. Related Vulnerabilities
Same product: v2
-
CVE-2026-55185
Miniflux 2: Open Redirect Bypass -
CVE-2026-21885
Miniflux Media Proxy SSRF via /proxy endpoint allows access -
CVE-2025-67713
Miniflux 2 has an Open Redirect via protocol-relative `redir -
CVE-2023-27591
Unauthenticated Miniflux user can bypass allowed networks ch -
CVE-2023-27592
Stored XSS in Miniflux when opening a broken image due to un
Same vendor: miniflux
-
CVE-2026-55185
Miniflux 2: Open Redirect Bypass -
CVE-2026-21885
Miniflux Media Proxy SSRF via /proxy endpoint allows access -
CVE-2025-67713
Miniflux 2 has an Open Redirect via protocol-relative `redir -
CVE-2023-27591
Unauthenticated Miniflux user can bypass allowed networks ch -
CVE-2023-27592
Stored XSS in Miniflux when opening a broken image due to un
Same weakness: CWE-79
-
CVE-2026-8630
justhtml before 1.12.0 Mutation XSS via Raw Text Elements -
CVE-2026-8445
justhtml before 1.12.0 Sanitizer Bypass via Markdown -
CVE-2026-77088
justhtml 0.9.0 through 1.21.0 Cross-Site Scripting via code- -
CVE-2026-74793
justhtml before 3.11.0 XSS via selectedcontent projection -
CVE-2026-6827
justhtml before 1.17.0 Multiple Cross-Site Scripting Vulnera
V. Comments for CVE-2025-31483
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