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Two XSS vulnerabilities in Movable Type



Published: 2020-02-13
Severity Low
Patch available YES
Number of vulnerabilities 2
CVE ID N/A
CWE ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Movable Type
Web applications / CMS

Vendor Six Apart Ltd

Security Advisory

1) Cross-site scripting

Severity: Low

CVSSv3: 4.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: N/A

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in WYSIWYG editor. A remote attacker can execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Movable Type: 6.5, 6.5.1, 6.5.2, 7.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.1, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5

CPE External links

https://movabletype.org/documentation/appendices/release-notes/6.5.3.html
https://movabletype.org/documentation/appendices/release-notes/7.2.0.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cross-site scripting

Severity: Low

CVSSv3: 5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: N/A

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in block editor. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Movable Type: 7.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.1, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5

CPE External links

https://movabletype.org/documentation/appendices/release-notes/7.2.0.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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