CVE-2023-6333 | Cross-site Scripting in ControlByWeb Relays

The affected ControlByWeb Relay products are vulnerable to a stored cross-site scripting vulnerability, which could allow an attacker to inject arbitrary scripts into the endpoint of a web interface that could run malicious javascript code during a user's session.

Published: 2023-12-07 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-6333 is rated Low Risk (32.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-6333

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.14% 0.03% -0.12%
2 2025-11-18 0.02% 0.14% +0.12%
3 2025-04-15 — 0.02% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-6333

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.7 5.3 [email protected]
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.3 2.7 [email protected]

Weakness enumeration for CVE-2023-6333

Affected software / configurations for CVE-2023-6333

Vendor Product Version Raw CPE
controlbyweb x-332-24i_firmware 1.06 cpe:2.3:o:controlbyweb:x-332-24i_firmware:1.06:*:*:*:*:*:*:*
controlbyweb x-301-i_firmware 1.15 cpe:2.3:o:controlbyweb:x-301-i_firmware:1.15:*:*:*:*:*:*:*
controlbyweb x-301-24i_firmware 1.15 cpe:2.3:o:controlbyweb:x-301-24i_firmware:1.15:*:*:*:*:*:*:*

References for CVE-2023-6333

URL Tags
https://www.cisa.gov/news-events/ics-advisories/icsa-23-341-05 Patch Third Party Advisory US Government Resource
cvelogic Threat Intelligence