What is the CVSS score of CVE-2020-11529?

CVE-2020-11529 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 10.9%.

Is there a public PoC exploit available for CVE-2020-11529?

Yes, a public proof-of-concept exploit is available for CVE-2020-11529. Prioritise patching immediately. EPSS: 10.9%.

Is there a patch available for CVE-2020-11529?

Yes, a patch is available for CVE-2020-11529. Update the affected software to the latest version immediately.

Grav CVE-2020-11529

MEDIUM

URL Redirection to Untrusted Site (Open Redirect) (CWE-601)

2020-04-04 cve@mitre.org

PHP Open Redirect Grav Getgrav

6.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-601 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V3 - Web Frontend Security Redirect URL validation MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived	A remote attacker could redirect users to malicious websites via URL manipulation by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 10.9% exploitation probability (EPSS)

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AnalysisAI

Common/Grav.php in Grav before 1.7 has an Open Redirect. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate redirect destinations against an allowlist, avoid using user input in redirect URLs.

Affected Packages

composer getgrav/grav fix: 1.6.23

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in composer

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

Technical ContextAI · show details

This vulnerability is classified as Open Redirect (CWE-601), which allows attackers to redirect users to malicious websites via URL manipulation. Common/Grav.php in Grav before 1.7 has an Open Redirect. This is partially fixed in 1.6.23 and still present in 1.6.x. Affected products include: Getgrav Grav. Version information: before 1.7.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

Common/Grav.php in Grav before 1.7 has an Open Redirect. This is partially fixed in 1.6.23 and still present in 1.6.x.

Threat Intelligence Overview

EPSS Score

10.9%

Top 5% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS POC (1)

GitHub

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 Yes

EPSS 10.9%

Patch available Yes

Active threat Yes

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· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +11

CVSS: +30

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Affected Products (CPE)NVD

cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*

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Same weakness CWE-601 – URL Redirection to Untrusted Site (Open Redirect)

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CVE-2017-1000117 HIGH POC

8.8

CVE-2016-5385 HIGH POC

8.1

CVE-2018-11784 MEDIUM POC

4.3

CVE-2017-3528 MEDIUM POC

5.4

CVE-2012-0518 MEDIUM

4.7

CVE-2024-21641 MEDIUM POC

6.5

CVE-2015-5354 MEDIUM POC

5.8

CVE-2024-22891 CRITICAL POC

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References

Advisories & patches

PATCH https://github.com/getgrav/grav/commit/2eae104c7a4bf32bc26cb8073d5c40464bfda3f7 ADVISORY https://getgrav.org/#changelog REF https://github.com/getgrav/grav/issues/3134

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GitHub PoC

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