Vulnerability

CVE-2026-87902

High· 8.1KEVEXPLOITCVSS8.1EPSS40%

.rules3/5

WordPress Core Remote File Inclusion Vulnerability

WordPress Core contains a remote file inclusion vulnerability which could allow an unauthenticated attacker to make page-template resolution include a chosen readable local `.php` file outside the active theme directories, leading to remote code execution.

Threat signal

100/100

Severe

Severity

high

CVSS

8.1

EPSS

40%

Active

KEV

CISA KEV — actively exploited

24d overdue

AffectedWordPress — Core

Added to KEV

2026-09-25

Federal patch due (BOD 22-01)

2026-09-28

Required action (CISA verbatim)

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Vendor advisory + references

CISA description: “WordPress Core contains a remote file inclusion vulnerability which could allow an unauthenticated attacker to make page-template resolution include a chosen readable local `.php` file outside the active theme directories, leading to remote code execution.”

CVSS

v3.1via NVDOpen in FIRST calculator →

8.1/ 10HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

40.0%

probability of exploitation in next 30 days

p99

higher than 99% of all CVEs

9-day trend↑ 0pp

Above the FIRST 'patch on a priority schedule' threshold.

Vendor VEX

No VEX statements published for CVE-2026-87902. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: yes
impact: total
mission: support

Lifecycle

2026-09-25Added to CISA KEVransomware: Unknown
2026-09-25Public exploit observedexploitdb
2026-09-25Published
2026-09-25Last modified2 sources
2026-09-28Federal patch due (BOD 22-01)