CVE-2026-27437
Deserialization of untrusted data enables object injection in ThemeREX Tennis Club.
Is CVE-2026-27437 being exploited?
Not confirmed. CVE-2026-27437 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 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-27437?
CVE-2026-27437 is rated Critical with a CVSS score of 9.8. 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-2026-27437?
Yes. A fix has been recorded for CVE-2026-27437. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27437 affect?
CVE-2026-27437 affects ThemeREX Tennis Club tennis-sportclub plugin <= 1.2.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27437?
Update to the vendor's fixed version.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can inject crafted serialized data to trigger object injection, risking remote code execution.
Patch when possible
- affected<= 1.2.3
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.