Quick answers
- Is CVE-2026-15539 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15539 being exploited in the wild.
- How severe is CVE-2026-15539?
- Medium severity, with a CVSS score of 4.7, published 13 July 2026.
- Which products and versions are affected?
- SourceCodester Online Book Store System 1.0.
- Is there a fix for CVE-2026-15539?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-15539 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-15539?
- Check whether you run SourceCodester Online Book Store System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An unrestricted file upload vulnerability exists in SourceCodester Online Book Store System 1.0 within the Book Image Upload feature. The flaw is located in the /admin/index.php?page=books component, where the application fails to properly validate the type or content of uploaded files. A remote attacker with high privileges (administrative access) can exploit this to upload dangerous file types, such as PHP scripts, to the web server. Successful exploitation can lead to Remote Code Execution (RCE) on the underlying host. As of the advisory date, no official patch has been identified for this version.
Affected products
- SourceCodester Online Book Store System 1.0
Timeline
- 2026-07-13: advisory: Vulnerability published by NVD/VulDB
- 2026-07-13: disclosed: Public exploit disclosed via Medium post