Multiple vulnerabilities in WordPress



| Updated: 2020-11-01
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2011-4956
CVE-2011-4957
CWE-ID CWE-79
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 WordPress
Web applications / CMS

Vendor WordPress.ORG

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU43930

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-4956

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

Exploit availability: No

Description

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in WordPress before 3.1.1. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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 update from vendor's website.

Vulnerable software versions

WordPress: 0.71 - 3.0.6

CPE2.3 External links

https://secunia.com/advisories/44038
https://secunia.com/advisories/49138
https://wordpress.org/news/2011/04/wordpress-3-1-1/
https://www.debian.org/security/2012/dsa-2470
https://www.openwall.com/lists/oss-security/2012/04/19/17
https://www.openwall.com/lists/oss-security/2012/04/19/6
https://www.osvdb.org/72141


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) Input validation error

EUVDB-ID: #VU43931

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4957

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WordPress: 0.71 - 3.0.6

CPE2.3 External links

https://core.trac.wordpress.org/ticket/16892
https://secunia.com/advisories/44038
https://secunia.com/advisories/49138
https://wordpress.org/news/2011/04/wordpress-3-1-1/
https://www.debian.org/security/2012/dsa-2470
https://www.openwall.com/lists/oss-security/2012/04/19/17
https://www.openwall.com/lists/oss-security/2012/04/19/6


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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