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Flying Scripts vulnerabilities
Flying Scripts has 1 known vulnerability in this database. The most recent published record is dated 16 Oct 2026.
- Known vulnerabilities
- 1
- Active installs
- 30,000+
- Latest version
- 1.2.5
- Last updated
- 10 Oct 2026
- Most recent
- 16 Oct 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2026-109990 | High 7.2 | Up to 1.2.4 | Fixed in a later version (latest 1.2.5) | 3 d ago |
Read the published descriptions
- CVE-2026-109990, 16 Oct 2026
- The Flying Scripts: Delay JavaScript to Improve Site Speed & Performance plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 1.2.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit bypasses WordPress core's save-time kses sanitization entirely because the payload uses only kses-allowed elements - an <abbr title> attribute and <code> text content - and the XSS is introduced post-save when the plugin's output-buffer rewriter substitutes a double-quote-bearing <code> body into the <abbr title> attribute via predictable, unsalted ___noise___ placeholder keys. CVE record
What to do if you run Flying Scripts
If you run Flying Scripts, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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