How severe is CVE-2025-50579?

CVE-2025-50579 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-50579 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-50579?

CVE-2025-50579 affects Jc21 Nginx Proxy Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-50579?

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

Does CVE-2025-50579 have an EU (EUVD) identifier?

Yes. CVE-2025-50579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25216.

When was CVE-2025-50579 published?

CVE-2025-50579 was published on 2025-08-19 and last updated on 2026-06-17.

CVE-2025-50579

CVE-2025-50579 is a medium-severity vulnerability in Jc21 Nginx Proxy Manager with a CVSS 3.x base score of 5.3. 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-1259.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25216
Weakness: CWE-1259
Affected product: Jc21 Nginx Proxy Manager
Published: 2025-08-19
Last modified: 2026-06-17

Description

A CORS misconfiguration in Nginx Proxy Manager v2.12.3 allows unauthorized domains to access sensitive data, particularly JWT tokens, due to improper validation of the Origin header. This misconfiguration enables attackers to intercept tokens using a simple browser script and exfiltrate them to a remote attacker-controlled server, potentially leading to unauthorized actions within the application.

Frequently asked questions

What is CVE-2025-50579?: A CORS misconfiguration in Nginx Proxy Manager v2.12.3 allows unauthorized domains to access sensitive data, particularly JWT tokens, due to improper validation of the Origin header. This misconfiguration enables attackers to intercept tokens using a simple browser script and exfiltrate them to a remote attacker-controlled server, potentially leading to unauthorized actions within the application.
How severe is CVE-2025-50579?: CVE-2025-50579 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-50579 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-50579?: CVE-2025-50579 affects Jc21 Nginx Proxy Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-50579?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-50579 have an EU (EUVD) identifier?: Yes. CVE-2025-50579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25216.
When was CVE-2025-50579 published?: CVE-2025-50579 was published on 2025-08-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jc21:nginx_proxy_manager:2.12.3:*:*:*:*:*:*:*

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