Quick answers
- Is CVE-2026-78527 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78527 being exploited in the wild.
- How severe is CVE-2026-78527?
- High severity, with a CVSS score of 8.8, published 30 October 2026.
- Which products and versions are affected?
- GS Plugins GS Testimonial Slider 3.3.10 and earlier.
- Is there a fix for CVE-2026-78527?
- No fixed version is recorded yet. Until an official patch is released, apply a WAF rule to block PHP object injection attacks targeting the plugin, or restrict contributor-level access to trusted users only. 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-2026-78527 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78527?
- Check whether you run GS Plugins GS Testimonial Slider 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.
How to fix
Until an official patch is released, apply a WAF rule to block PHP object injection attacks targeting the plugin, or restrict contributor-level access to trusted users only.
Technical details
A PHP object injection vulnerability exists in GS Testimonial Slider due to unsafe deserialization of user-controlled input. An attacker with contributor-level privileges can craft malicious serialized objects to trigger arbitrary code execution on the server. No official patch is currently available.
Affected products
- GS Plugins GS Testimonial Slider 3.3.10 and earlier
Timeline
- 2026-10-30: disclosed