Stored XSS in BlogoText

1) Stored Cross-site scripting

EUVDB-ID: #VU8655

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14957

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 via a comment in inc/conv.php in BlogoText before 3.7.6. 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

Update to version 3.7.6.

Vulnerable software versions

BlogoText: 3.7.0 - 3.7.5

External links

http://openwall.com/lists/oss-security/2017/10/01/1
http://github.com/BlogoText/blogotext/issues/318
http://github.com/BlogoText/blogotext/pull/320/commits/1a283cc8ad2cda37e0a6aff8f4558b98ecbfd9c2
http://github.com/BlogoText/blogotext/releases/tag/3.7.6

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.