How severe is CVE-2017-18109?

CVE-2017-18109 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-18109 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18109?

CVE-2017-18109 primarily affects Atlassian Crowd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-18109?

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

When was CVE-2017-18109 published?

CVE-2017-18109 was published on 2019-03-29 and last updated on 2026-06-17.

CVE-2017-18109

CVE-2017-18109 is a medium-severity vulnerability in Atlassian Crowd with a CVSS 3.x base score of 6.1. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Atlassian Crowd
Published: 2019-03-29
Last modified: 2026-06-17

Description

The login resource of CrowdId in Atlassian Crowd before version 3.0.2 and from version 3.1.0 before version 3.1.1 allows remote attackers to redirect users to a different website which they may use as part of performing a phishing attack via an open redirect.

Frequently asked questions

What is CVE-2017-18109?: The login resource of CrowdId in Atlassian Crowd before version 3.0.2 and from version 3.1.0 before version 3.1.1 allows remote attackers to redirect users to a different website which they may use as part of performing a phishing attack via an open redirect.
How severe is CVE-2017-18109?: CVE-2017-18109 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-18109 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18109?: CVE-2017-18109 primarily affects Atlassian Crowd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-18109?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-18109 published?: CVE-2017-18109 was published on 2019-03-29 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/CWD-5071

Affected products (2)

cpe:2.3:a:atlassian:crowd:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:crowd:3.1.0:*:*:*:*:*:*:*

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