How severe is CVE-2018-13439?

CVE-2018-13439 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-13439 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-13439?

CVE-2018-13439 affects Tencent Wechat Pay. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-13439?

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.

When was CVE-2018-13439 published?

CVE-2018-13439 was published on 2018-07-08 and last updated on 2026-06-17.

CVE-2018-13439

CVE-2018-13439 is a high-severity vulnerability in Tencent Wechat Pay with a CVSS 3.x base score of 7.5. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Tencent Wechat Pay
Published: 2018-07-08
Last modified: 2026-06-17

Description

WXPayUtil in WeChat Pay Java SDK allows XXE attacks involving a merchant notification URL.

Frequently asked questions

What is CVE-2018-13439?: WXPayUtil in WeChat Pay Java SDK allows XXE attacks involving a merchant notification URL.
How severe is CVE-2018-13439?: CVE-2018-13439 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-13439 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-13439?: CVE-2018-13439 affects Tencent Wechat Pay. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-13439?: 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.
When was CVE-2018-13439 published?: CVE-2018-13439 was published on 2018-07-08 and last updated on 2026-06-17.

References

https://packetstormsecurity.com/files/148390/WeChat-Pay-SDK-XXE-Injection.html

Affected products (1)

cpe:2.3:a:tencent:wechat_pay:-:*:*:*:*:*:*:*

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