CVE-2026-39757
Subscriber arbitrary file upload in Taskbot WordPress plugin allows site compromise
Is CVE-2026-39757 being exploited?
Not confirmed. CVE-2026-39757 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 0.48% probability of exploitation in the next 30 days.
How severe is CVE-2026-39757?
CVE-2026-39757 is rated Critical with a CVSS score of 9.9. 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-2026-39757?
Not known from our data. No patch reference has been recorded for CVE-2026-39757, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-39757 affect?
CVE-2026-39757 affects WordPress Taskbot plugin (<= 6.6), Self-hosted WordPress sites using Taskbot. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39757?
Update or remove Taskbot plugin; scan for web shells and restore from clean backups.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Subscriber-level arbitrary file upload enabling web shells, remote code execution, site takeover, and data exposure.
Immediate action required
- affected<= 6.6
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.