How severe is CVE-2018-20000?

CVE-2018-20000 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-2018-20000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20000?

CVE-2018-20000 affects Apereo Bw-webdav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20000?

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-2018-20000 published?

CVE-2018-20000 was published on 2018-12-10 and last updated on 2026-06-17.

CVE-2018-20000

CVE-2018-20000 is a high-severity vulnerability in Apereo Bw-webdav 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% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Apereo Bw-webdav
Published: 2018-12-10
Last modified: 2026-06-17

Description

Apereo Bedework bw-webdav before 4.0.3 allows XXE attacks, as demonstrated by an invite-reply document that reads a local file, related to webdav/servlet/common/MethodBase.java and webdav/servlet/common/PostRequestPars.java.

Frequently asked questions

What is CVE-2018-20000?: Apereo Bedework bw-webdav before 4.0.3 allows XXE attacks, as demonstrated by an invite-reply document that reads a local file, related to webdav/servlet/common/MethodBase.java and webdav/servlet/common/PostRequestPars.java.
How severe is CVE-2018-20000?: CVE-2018-20000 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-2018-20000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20000?: CVE-2018-20000 affects Apereo Bw-webdav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20000?: 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-2018-20000 published?: CVE-2018-20000 was published on 2018-12-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apereo:bw-webdav:*:*:*:*:*:*:*:*

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