How severe is CVE-2019-3803?

CVE-2019-3803 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2019-3803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3803?

CVE-2019-3803 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3803?

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

When was CVE-2019-3803 published?

CVE-2019-3803 was published on 2019-01-12 and last updated on 2026-06-17.

CVE-2019-3803

CVE-2019-3803 is a medium-severity vulnerability in Pivotal Software Concourse with a CVSS 3.x base score of 4.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Pivotal Software Concourse
Published: 2019-01-12
Last modified: 2026-06-17

Description

Pivotal Concourse, all versions prior to 4.2.2, puts the user access token in a url during the login flow. A remote attacker who gains access to a user's browser history could obtain the access token and use it to authenticate as the user.

Frequently asked questions

What is CVE-2019-3803?: Pivotal Concourse, all versions prior to 4.2.2, puts the user access token in a url during the login flow. A remote attacker who gains access to a user's browser history could obtain the access token and use it to authenticate as the user.
How severe is CVE-2019-3803?: CVE-2019-3803 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2019-3803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3803?: CVE-2019-3803 affects Pivotal Software Concourse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-3803 published?: CVE-2019-3803 was published on 2019-01-12 and last updated on 2026-06-17.

References

https://pivotal.io/security/cve-2019-3803

Affected products (1)

cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*

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