Cross-Site Request Forgery in EFACEC BCU 500

published 2023-12-19 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58910

cvss: 8.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

A successful CSRF attack could force the user to perform state changing requests on the application. If the victim is an administrative account, a CSRF attack could compromise the entire web application.

Vendor advisories

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

cisa ICSA-23-353-02 updated 2023-12-19 cvss 8.2

EFACEC BCU 500

EFACEC BCU 500 4.07
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

0.25% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

EFACEC BCU 500

Classification

Weakness

CWE-352 Cross-Site Request Forgery

References

cisa.gov /news-events/ics-advisories/icsa-23-353-02
government-resource, third-party-advisory, us-government-resource

Sources

CVE List CVE-2023-6689
NVD CVE-2023-6689

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary