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Revive So EUVDEUVD-2026-20203

| CVE-2026-39561 MEDIUM
Missing Authorization (CWE-862)
2026-04-08 Patchstack GHSA-g4m4-g557-q87f
5.3
CVSS 3.1 · Vendor: Patchstack
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

While the CVSS 5.3 score suggests moderate risk with low confidentiality impact, the EPSS score of 0.02% (4th percentile) indicates this vulnerability has negligible real-world exploitation likelihood. The attack vector is network-based with no authentication or user interaction required, theoretically maximizing accessibility; however, the absence of public exploit code, lack of active exploitation confirmation, and extremely low EPSS percentile suggest the vulnerability is either difficult to exploit in practice, targets a narrow edge case, or affects a plugin with limited deployment. This represents a low-priority remediation despite moderate CVSS - a classic example of CVSS overestimation relative to true exploitation risk. Organizations should prioritize patching higher-EPSS vulnerabilities first.

Exploit ScenarioDerived

An unauthenticated attacker sends a crafted network request to a WordPress site running Revive.so 2.0.7 or earlier, exploiting the misconfigured access control to read sensitive information protected by the plugin's access control layers. The attacker requires only network access and can carry out the attack without authentication or user interaction. No specialized exploit code has been publicly released, suggesting the attack likely requires knowledge of the specific misconfigured endpoints or parameter manipulation.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 08, 2026

Missing authorization in WP Chill Revive.so plugin versions up to 2.0.7 allows unauthenticated remote attackers to bypass access controls and read sensitive information via incorrectly configured access control security levels. The vulnerability has an EPSS score of 0.02% (4th percentile), indicating minimal real-world exploitation probability despite the moderate CVSS 5.3 score. No public exploit code or active exploitation has been confirmed.

RemediationAI

Update the WP Chill Revive.so plugin to version 2.0.8 or later, which contains the fix for the missing authorization vulnerability. This update should be applied immediately through the WordPress plugin management interface or by manual upload. Refer to the Patchstack vulnerability database entry (https://patchstack.com/database/Wordpress/Plugin/revive-so/vulnerability/wordpress-revive-so-plugin-2-0-7-broken-access-control-vulnerability?_s_id=cve) for detailed advisory information and patch confirmation. No workarounds are available for this access control issue, making patching the only effective mitigation.

Affected VersionsENISA

Revive.so 0 ≤2.0.7

Affected Packages

euvd revive_so no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This is a missing authorization vulnerability (CWE-862) in the WordPress plugin Revive.so, affecting all versions from the beginning through 2.0.7. The root cause is improper access control implementation that fails to enforce proper authorization checks before exposing sensitive data or functionality. The vulnerability allows unauthenticated attackers (CVSS PR:N) to exploit misconfigured security levels via network access (AV:N) with low complexity (AC:L). The CPE designation cpe:2.3:a:wp_chill:revive.so:*:*:*:*:*:*:*:* confirms the plugin is developed by WP Chill and affects all variants and versions up to the currently vulnerable release.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from Vendor (Patchstack) · only source for this CVE.

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

DescriptionCVE.org

Missing Authorization vulnerability in WP Chill Revive.so revive-so allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Revive.so: from n/a through <= 2.0.7.

Threat Intelligence Overview

EPSS Score
0.0%
Top 96% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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