How severe is CVE-2018-19531?

CVE-2018-19531 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-19531 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19531?

CVE-2018-19531 affects Httl Project Httl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19531?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-19531 published?

CVE-2018-19531 was published on 2018-11-26 and last updated on 2026-06-17.

CVE-2018-19531

CVE-2018-19531 is a critical-severity vulnerability in Httl Project Httl with a CVSS 3.x base score of 9.8. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Httl Project Httl
Published: 2018-11-26
Last modified: 2026-06-17

Description

HTTL (aka Hyper-Text Template Language) through 1.0.11 allows remote command execution because the decodeXml function uses java.beans.XMLEncoder unsafely when configured without an xml.codec= setting.

Frequently asked questions

What is CVE-2018-19531?: HTTL (aka Hyper-Text Template Language) through 1.0.11 allows remote command execution because the decodeXml function uses java.beans.XMLEncoder unsafely when configured without an xml.codec= setting.
How severe is CVE-2018-19531?: CVE-2018-19531 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-19531 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19531?: CVE-2018-19531 affects Httl Project Httl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19531?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-19531 published?: CVE-2018-19531 was published on 2018-11-26 and last updated on 2026-06-17.

References

https://github.com/httl/httl/issues/224

Affected products (1)

cpe:2.3:a:httl_project:httl:*:*:*:*:*:*:*:*

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