URL Redirection to Untrusted Site ('Open Redirect') in EFACEC UC 500E

published 2023-12-19 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-55481

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

An attacker could construct a URL within the application that causes a redirection to an arbitrary external domain and could be leveraged to facilitate phishing attacks against application users.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-353-03 updated 2023-12-19 cvss 4.3

EFACEC UC 500E

EFACEC UC 500E 10.1.0
affected: vendor fix, mitigation “For more information, contact EFACEC support.” efacec.pt

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-01-06)

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

EFACEC UC 500E

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

cisa.gov /news-events/ics-advisories/icsa-23-353-03
government-resource, third-party-advisory, us-government-resource

Sources

CVE List CVE-2023-50704
NVD CVE-2023-50704

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Summary