How severe is CVE-2026-37504?

CVE-2026-37504 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-37504 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-37504?

CVE-2026-37504 affects V2board. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-37504?

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

Does CVE-2026-37504 have an EU (EUVD) identifier?

Yes. CVE-2026-37504 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26668.

When was CVE-2026-37504 published?

CVE-2026-37504 was published on 2026-05-01 and last updated on 2026-06-17.

CVE-2026-37504

CVE-2026-37504 is a medium-severity vulnerability in V2board 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-598.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26668
Weakness: CWE-598
Affected product: V2board
Published: 2026-05-01
Last modified: 2026-06-17

Description

Sensitive server_token exposed via GET parameter in V2Board thru 1.7.4. In app/Http/Controllers/Server/UniProxyController.php, the server authentication token is accepted via GET parameter transmission. The token appears in URLs such as /api/v1/server/UniProxy/user?token=SECRET, causing it to be recorded in web server access logs, browser history, HTTP Referer headers, and proxy/CDN logs. An attacker who gains access to any log source can extract the token and impersonate a proxy server node, potentially intercepting all user traffic.

Frequently asked questions

What is CVE-2026-37504?: Sensitive server_token exposed via GET parameter in V2Board thru 1.7.4. In app/Http/Controllers/Server/UniProxyController.php, the server authentication token is accepted via GET parameter transmission. The token appears in URLs such as /api/v1/server/UniProxy/user?token=SECRET, causing it to be recorded in web server access logs, browser history, HTTP Referer headers, and proxy/CDN logs. An attacker who gains access to any log source can extract the token and impersonate a proxy server node, potentially intercepting all user traffic.
How severe is CVE-2026-37504?: CVE-2026-37504 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-37504 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-37504?: CVE-2026-37504 affects V2board. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-37504?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-37504 have an EU (EUVD) identifier?: Yes. CVE-2026-37504 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26668.
When was CVE-2026-37504 published?: CVE-2026-37504 was published on 2026-05-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*

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