CVE-2026-5411
Authenticated WP Captcha PRO users can upload PHP webshells, enabling RCE (<=5.38).
Is CVE-2026-5411 being exploited?
Not confirmed. CVE-2026-5411 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.61% probability of exploitation in the next 30 days.
How severe is CVE-2026-5411?
CVE-2026-5411 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-5411?
Yes. A fix has been recorded for CVE-2026-5411. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-5411 affect?
CVE-2026-5411 affects WordPress WP Captcha PRO plugin (<= 5.38). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-5411?
Patch to latest version; disable allow_url_fopen if not needed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution by uploading PHP webshells to web-accessible dir; requires allow_url_fopen enabled.
Immediate action required
- affected<= 5.38
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.