Vulnerability CVE-2021-39249
Published: 2021-08-17   Modified: 2021-08-18

Description:
Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows reflected XSS because the filenames of uploaded files become predictable through a brute-force attack against the PHP mt_rand function.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Invisioncommunity -> Invision power board 

 References:
https://ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain/
https://invisioncommunity.com/release-notes/4651-r102/
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