Quick answers
- Is CVE-2026-39587 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-39587 being exploited in the wild.
- How severe is CVE-2026-39587?
- High severity, with a CVSS score of 8.1, published 15 June 2026.
- Which products and versions are affected?
- WP BASE Booking <= 5.9.0.
- Is there a fix for CVE-2026-39587?
- 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-2026-39587 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-39587?
- Check whether you run WP BASE Booking 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
The WP BASE Booking plugin for WordPress (versions <= 5.9.0) contains a privilege escalation vulnerability classified under CWE-266 (Incorrect Privilege Assignment). The flaw allows an unauthenticated remote attacker to escalate their privileges, potentially gaining administrator-level access to the WordPress environment. While the attack complexity is rated as high, the impact is critical as it bypasses authentication requirements to compromise the integrity and confidentiality of the site. The issue is resolved in version 6.0.0.
Affected products
- WP BASE Booking WP BASE Booking <= 5.9.0
Timeline
- 2026-02-11: other: Reported by Jarno Vos
- 2026-04-08: advisory: Patchstack advisory published
- 2026-06-15: disclosed: NVD publication date