How severe is CVE-2018-1000840?

CVE-2018-1000840 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-1000840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000840?

CVE-2018-1000840 affects Processing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000840?

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

When was CVE-2018-1000840 published?

CVE-2018-1000840 was published on 2018-12-20 and last updated on 2026-06-17.

CVE-2018-1000840

CVE-2018-1000840 is a medium-severity vulnerability in Processing with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Processing
Published: 2018-12-20
Last modified: 2026-06-17

Description

Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in loadXML() function that can result in An attacker can read arbitrary files and exfiltrate their contents via HTTP requests. This attack appear to be exploitable via The victim must use Processing to parse a crafted XML document.

Frequently asked questions

What is CVE-2018-1000840?: Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in loadXML() function that can result in An attacker can read arbitrary files and exfiltrate their contents via HTTP requests. This attack appear to be exploitable via The victim must use Processing to parse a crafted XML document.
How severe is CVE-2018-1000840?: CVE-2018-1000840 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-1000840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000840?: CVE-2018-1000840 affects Processing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1000840 published?: CVE-2018-1000840 was published on 2018-12-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:processing:processing:*:*:*:*:*:*:*:*

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