concrete5 up to 8.2.x Comment view_ajax.php cnvID input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in concrete5 up to 8.2.x. Impacted is an unknown function of the file tools/conversations/view_ajax.php of the component Comment Handler. This manipulation of the argument cnvID as part of Integer causes input validation. This vulnerability appears as CVE-2017-18195. The attack may be initiated remotely. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in concrete5 up to 8.2.x. Affected by this vulnerability is some unknown processing of the file tools/conversations/view_ajax.php of the component Comment Handler. The manipulation of the argument cnvID as part of a Integer leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in tools/conversations/view_ajax.php in Concrete5 before 8.3.0. An unauthenticated user can enumerate comments from all blog posts by POSTing requests to /index.php/tools/required/conversations/view_ajax with incremental 'cnvID' integers.

The bug was discovered 10/19/2017. The weakness was presented 02/26/2018 (Website). The advisory is shared at github.com. This vulnerability is known as CVE-2017-18195 since 02/23/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 130 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:tools/conversations/view_ajax.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 8.3.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (44194). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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OpenVAS ID: 53605
OpenVAS Name: Concrete5 Authentication Bypass Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: concrete5 8.3.0
Patch: github.com

Timelineinfo

10/19/2017 🔍
02/23/2018 +127 days 🔍
02/26/2018 +3 days 🔍
02/26/2018 +0 days 🔍
02/27/2018 +1 days 🔍
08/24/2025 +2735 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2017-18195 (🔍)
GCVE (CVE): GCVE-0-2017-18195
GCVE (VulDB): GCVE-100-113833
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/27/2018 07:48
Updated: 08/24/2025 10:27
Changes: 02/27/2018 07:48 (66), 01/08/2020 16:12 (4), 02/10/2023 11:20 (5), 08/24/2025 10:27 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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