CVE-2021-45092

published 2021-12-16

CVE-2021-45092: Thinfinity VirtualUI before 3.0 has functionality in /lab.html reachable by default that could allow IFRAME injection via the vpath parameter.

Priority P1 85 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

ITW EXPLOIT VulnCheck KEV

Thinfinity VirtualUI before 3.0 has functionality in /lab.html reachable by default that could allow IFRAME injection via the vpath parameter.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
cybelesoft	thinfinity_virtualui	< 3.0	3.0

Detection & IOCs extracted from sources · hover to see the quote

path /lab.html↗

url /lab.html?vpath=//interact.sh↗

sigma↗

GET /lab.html?vpath=// (regex match: .*vpath.* AND thinfinity)

• → Use Shodan/FOFA/Google dorks to identify exposed Thinfinity VirtualUI instances as potential targets: http.title:"thinfinity virtualui" / title="thinfinity virtualui" / intitle:"thinfinity virtualui" ↗
• → Affected versions confirmed by exploit author: VirtualUI 2.1.37.2, 2.1.42.2, 2.5.0.0, 2.5.36.1, 2.5.36.2, and 2.5.41.0 — all versions before 3.0 are considered vulnerable. ↗

• · The vulnerable endpoint /lab.html is reachable by default with no authentication required, meaning no special configuration is needed for exploitation — unauthenticated attackers can reach it on any default install. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P

vulncheck 9.8 CRITICAL

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-74