Bitrix24 up to 20.0.950 Web Application Firewall post_filter.php cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Bitrix24 up to 20.0.950. Affected by this issue is some unknown functionality of the file modules/security/classes/general.post_filter.php/post_filter.php of the component Web Application Firewall. The manipulation with the input %00 leads to cross site scripting. This vulnerability is referenced as CVE-2020-13758. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Bitrix24 up to 20.0.950. It has been rated as problematic. This issue affects an unknown code of the file modules/security/classes/general.post_filter.php/post_filter.php of the component Web Application Firewall. The manipulation with the input value %00 leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

modules/security/classes/general.post_filter.php/post_filter.php in the Web Application Firewall in Bitrix24 through 20.0.950 allows XSS by placing %00 before the payload.

The weakness was published 06/01/2020. The identification of this vulnerability is CVE-2020-13758 since 06/01/2020. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:modules/security/classes/general.post_filter.php/post_filter.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
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: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/01/2020 🔍
06/01/2020 +0 days 🔍
06/02/2020 +1 days 🔍
06/02/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-13758 (🔍)
GCVE (CVE): GCVE-0-2020-13758
GCVE (VulDB): GCVE-100-155915

Entryinfo

Created: 06/02/2020 06:42
Updated: 06/02/2020 06:47
Changes: 06/02/2020 06:42 (36), 06/02/2020 06:47 (17)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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