How severe is CVE-2025-66923?

CVE-2025-66923 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66923?

CVE-2025-66923 affects Opensourcepos Open Source Point Of Sale. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66923?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66923 have an EU (EUVD) identifier?

Yes. CVE-2025-66923 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203908.

When was CVE-2025-66923 published?

CVE-2025-66923 was published on 2025-12-17 and last updated on 2026-06-17.

CVE-2025-66923

CVE-2025-66923 is a high-severity vulnerability in Opensourcepos Open Source Point Of Sale with a CVSS 3.x base score of 7.2. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203908
Weakness: CWE-20
Affected product: Opensourcepos Open Source Point Of Sale
Published: 2025-12-17
Last modified: 2026-06-17

Description

A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary web script or HTML via the phone_number parameter.

Frequently asked questions

What is CVE-2025-66923?: A Cross-site scripting (XSS) vulnerability in Create/Update Customer(s) in Open Source Point of Sale v3.4.1 allows remote attackers to inject arbitrary web script or HTML via the phone_number parameter.
How severe is CVE-2025-66923?: CVE-2025-66923 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66923?: CVE-2025-66923 affects Opensourcepos Open Source Point Of Sale. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66923?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66923 have an EU (EUVD) identifier?: Yes. CVE-2025-66923 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203908.
When was CVE-2025-66923 published?: CVE-2025-66923 was published on 2025-12-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opensourcepos:open_source_point_of_sale:3.4.1:*:*:*:*:*:*:*

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