CVE-2021-39249

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.34%
Vendor Advisory invisioncommunity.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain/ third party advisory exploit
https://invisioncommunity.com/release-notes/4651-r102/ release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-39249?
CVE-2021-39249 has been scored as a medium severity vulnerability.
How to fix CVE-2021-39249?
To fix CVE-2021-39249, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39249 being actively exploited in the wild?
It is possible that CVE-2021-39249 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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