7.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2023-38489

GHSA ID

GHSA-5mvj-rvp8-rf45

EPSS Score

0.36831%

CWE

CWE-613

Published

7/28/2023

Updated

11/7/2023

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2023-38489

CVE-2023-38489: Insufficient Session Expiration after a password change

TL;DR

This vulnerability affects all Kirby sites with user accounts (unless Kirby's API and Panel are disabled in the config).

It can only be abused if a Kirby user is logged in on a device or browser that is shared with potentially untrusted users or if an attacker already maliciously used a previous password to log in to a Kirby site as the affected user.

Introduction

Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.

In the variation described in this advisory, it allows attackers to stay logged in to a Kirby site on another device or browser even if the logged in user has since changed their password.

Impact

Kirby did not invalidate old user sessions after the user password was changed by the user or by a site admin.

If a user changed their password to lock out an attacker who was already in possession of the previous password or of a login session on another device or browser, the attacker would not be reliably prevented from accessing the Kirby site as the affected user.

Patches

The problem has been patched in Kirby 3.5.8.3, Kirby 3.6.6.3, Kirby 3.7.5.2, Kirby 3.8.4.1 and Kirby 3.9.6. Please update to one of these or a later version to fix the vulnerability.

In all of the mentioned releases, we have updated the authentication implementation to keep track of the last time the password was changed. If a new password was set since the login, the session is invalidated. To enforce this fix even if the vulnerability was previously abused, all users are logged out from the Kirby site after updating to one of the patched releases.

Credits

Thanks to Shankar Acharya (@5hank4r) for responsibly reporting the identified issue.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-38489

CVE-2023-38489:

7.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2023-38489

GHSA ID

GHSA-5mvj-rvp8-rf45

EPSS Score

0.36831%

CWE

CWE-613

Published

7/28/2023

Updated

11/7/2023

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
getkirby/cms	composer	< 3.5.8.3	3.5.8.3
getkirby/cms	composer	>= 3.6.0, < 3.6.6.3	3.6.6.3
getkirby/cms	composer	>= 3.7.0, < 3.7.5.2	3.7.5.2
getkirby/cms	composer	>= 3.8.0, < 3.8.4.1	3.8.4.1
getkirby/cms	composer	>= 3.9.0, < 3.9.6	3.9.6

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stemmed from two key gaps: 1) Session validation in Auth::currentUserFromSession lacked password change timestamp checks, and 2) Login mechanisms didn't record essential timing metadata. The commit added passwordTimestamp() checks in Auth.php and login timestamp storage in User.php, confirming these were the missing protections. The test patches in AuthTest.php that validate session invalidation after password changes further corroborate these functions' central role in the vulnerability.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

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7.3

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2023-38489: Insufficient Session Expiration after a password change

TL;DR

Introduction

Impact

Patches

Credits

CVE-2023-38489:

7.3

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

7.3

7.3

CVE-2023-38489: Insufficient Session Expiration after a password change

TL;DR

Introduction

Impact

Patches

Credits

Technical Details

Basic Information

Basic Information

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI