How severe is CVE-2025-4839?

CVE-2025-4839 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-4839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4839?

CVE-2025-4839 primarily affects Itwanger Paicoding. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-4839?

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

Does CVE-2025-4839 have an EU (EUVD) identifier?

Yes. CVE-2025-4839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15611.

When was CVE-2025-4839 published?

CVE-2025-4839 was published on 2025-05-17 and last updated on 2026-06-17.

CVE-2025-4839

CVE-2025-4839 is a low-severity vulnerability in Itwanger Paicoding with a CVSS 3.x base score of 3.1. 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-346.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v2: 2.6
CVSS v4: 2.3
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-15611
Weakness: CWE-346
Affected product: Itwanger Paicoding
Published: 2025-05-17
Last modified: 2026-06-17

Description

A vulnerability has been found in itwanger paicoding 1.0.0/1.0.1/1.0.2/1.0.3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /paicoding-core/src/main/java/com/github/paicoding/forum/core/util/CrossUtil.java. The manipulation leads to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-4839?: A vulnerability has been found in itwanger paicoding 1.0.0/1.0.1/1.0.2/1.0.3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /paicoding-core/src/main/java/com/github/paicoding/forum/core/util/CrossUtil.java. The manipulation leads to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-4839?: CVE-2025-4839 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-4839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4839?: CVE-2025-4839 primarily affects Itwanger Paicoding. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-4839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4839 have an EU (EUVD) identifier?: Yes. CVE-2025-4839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15611.
When was CVE-2025-4839 published?: CVE-2025-4839 was published on 2025-05-17 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:itwanger:paicoding:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:itwanger:paicoding:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:itwanger:paicoding:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:itwanger:paicoding:1.0.3:*:*:*:*:*:*:*

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