CVE-2021-39249: invisioncommunity invision_power_board Use of Insufficiently Random Values
CVSS: 6.1v3.1MediumModified
Published 17-08-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-39249 is a medium (CVSS 6.1) Use of Insufficiently Random Values vulnerability in invisioncommunity invision_power_board. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 55% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.1/10
010
Medium · v3.1 (NVD)EPSS score
0.77%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 17-08-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.77%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
0.00 pp
From 0.77% on 22-09-2026
22-09-202622-10-2026
EPSS score0.77%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (ssd-disclosure.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Invisioncommunity1 product
- invision_power_board< 4.6.5.1
1 vendor · 1 product
References
2 links- ssd-disclosure.com/ssd-advisory-ip-board-stored-xss-to-rce-chain/X Refsource MISCExploitThird Party Advisory