How severe is CVE-2023-40143?

CVE-2023-40143 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-40143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40143?

CVE-2023-40143 affects Westermo L206-f2g Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40143?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-40143 have an EU (EUVD) identifier?

Yes. CVE-2023-40143 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44750.

When was CVE-2023-40143 published?

CVE-2023-40143 was published on 2024-02-06 and last updated on 2026-06-17.

CVE-2023-40143

CVE-2023-40143 is a medium-severity vulnerability in Westermo L206-f2g Firmware with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44750
Weakness: CWE-79
Affected product: Westermo L206-f2g Firmware
Published: 2024-02-06
Last modified: 2026-06-17

Description

An attacker with access to the Westermo Lynx web application that has the vulnerable software could introduce arbitrary JavaScript by injecting a cross-site scripting payload into the "forward.0.domain" parameter.

Frequently asked questions

What is CVE-2023-40143?: An attacker with access to the Westermo Lynx web application that has the vulnerable software could introduce arbitrary JavaScript by injecting a cross-site scripting payload into the "forward.0.domain" parameter.
How severe is CVE-2023-40143?: CVE-2023-40143 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-40143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40143?: CVE-2023-40143 affects Westermo L206-f2g Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-40143 have an EU (EUVD) identifier?: Yes. CVE-2023-40143 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44750.
When was CVE-2023-40143 published?: CVE-2023-40143 was published on 2024-02-06 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-24-023-04

Affected products (1)

cpe:2.3:o:westermo:l206-f2g_firmware:4.24:*:*:*:*:*:*:*

More vulnerabilities in Westermo L206-f2g Firmware

CVE-2023-45735 — High (CVSS 8.0): A potential attacker with access to the Westermo Lynx device may be able to execute malicious code that could affect…
CVE-2023-38579 — High (CVSS 8.0): The cross-site request forgery token in the request may be predictable or easily guessable allowing attackers to craft…
CVE-2023-45213 — Medium (CVSS 6.6): A potential attacker with access to the Westermo Lynx device would be able to execute malicious code that could affect…
CVE-2023-40544 — Medium (CVSS 5.7): An attacker with access to the network where the affected devices are located could maliciously actions to obtain, via…
CVE-2023-45227 — Medium (CVSS 5.4): An attacker with access to the web application with vulnerable software could introduce arbitrary JavaScript by…
CVE-2023-45222 — Medium (CVSS 5.4): An attacker with access to the web application that has the vulnerable software could introduce arbitrary JavaScript by…

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