Quick answers
- Is CVE-2026-78273 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78273 being exploited in the wild.
- How severe is CVE-2026-78273?
- Medium severity, with a CVSS score of 6.5, published 27 August 2026.
- Which products and versions are affected?
- WP ManageNinja Fluent Boards Pro <= 2.0.11.
- Is there a fix for CVE-2026-78273?
- A patch was published on 2026: version 2.0.12 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-78273 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78273?
- Check whether you run WP ManageNinja Fluent Boards Pro 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
This is a stored or reflected cross-site scripting (XSS) vulnerability in Fluent Boards Pro versions up to 2.0.11 that requires subscriber-level privileges to exploit. The vulnerability exists in subscriber functionality, allowing an authenticated subscriber to inject malicious JavaScript code. Successful exploitation requires user interaction (e.g., clicking a malicious link or visiting a crafted page), but once triggered, the injected script executes in the context of victims' browsers. An attacker can steal session cookies, perform actions on behalf of logged-in users, or redirect visitors to phishing sites. The vulnerability was patched in version 2.0.12.
Affected products
- WP ManageNinja Fluent Boards Pro <= 2.0.11
Timeline
- 2026-08-26: disclosed
- 2026: patched: version 2.0.12