How severe is CVE-2018-18737?

CVE-2018-18737 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-2018-18737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18737?

CVE-2018-18737 affects Douchat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18737?

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-2018-18737 published?

CVE-2018-18737 was published on 2018-10-29 and last updated on 2026-06-17.

CVE-2018-18737

CVE-2018-18737 is a high-severity vulnerability in Douchat 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: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Douchat
Published: 2018-10-29
Last modified: 2026-06-17

Description

An XXE issue was discovered in Douchat 4.0.4 because Data\notify.php calls simplexml_load_string. This can also be used for SSRF.

Frequently asked questions

What is CVE-2018-18737?: An XXE issue was discovered in Douchat 4.0.4 because Data\notify.php calls simplexml_load_string. This can also be used for SSRF.
How severe is CVE-2018-18737?: CVE-2018-18737 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-2018-18737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18737?: CVE-2018-18737 affects Douchat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18737?: 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-2018-18737 published?: CVE-2018-18737 was published on 2018-10-29 and last updated on 2026-06-17.

References

https://github.com/AvaterXXX/douchat/blob/master/xxe.md#xxe

Affected products (1)

cpe:2.3:a:douchat:douchat:4.0.4:*:*:*:*:*:*:*

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