How severe is CVE-2017-18105?

CVE-2017-18105 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-18105 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18105?

CVE-2017-18105 affects Atlassian Crowd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18105?

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-2017-18105 published?

CVE-2017-18105 was published on 2019-03-29 and last updated on 2026-06-17.

CVE-2017-18105

CVE-2017-18105 is a high-severity vulnerability in Atlassian Crowd with a CVSS 3.x base score of 8.1. 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-384.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Atlassian Crowd
Published: 2019-03-29
Last modified: 2026-06-17

Description

The console login resource in Atlassian Crowd before version 3.0.2 and from version 3.1.0 before version 3.1.1 allows remote attackers, who have previously obtained a user's JSESSIONID cookie, to gain access to some of the built-in and potentially third party rest resources via a session fixation vulnerability.

Frequently asked questions

What is CVE-2017-18105?: The console login resource in Atlassian Crowd before version 3.0.2 and from version 3.1.0 before version 3.1.1 allows remote attackers, who have previously obtained a user's JSESSIONID cookie, to gain access to some of the built-in and potentially third party rest resources via a session fixation vulnerability.
How severe is CVE-2017-18105?: CVE-2017-18105 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-18105 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18105?: CVE-2017-18105 affects Atlassian Crowd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18105?: 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-2017-18105 published?: CVE-2017-18105 was published on 2019-03-29 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/CWD-5072

Affected products (1)

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

More vulnerabilities in Atlassian Crowd

CVE-2022-43782 — Critical (CVSS 9.8): Affected versions of Atlassian Crowd allow an attacker to authenticate as the crowd application via security…
CVE-2022-26136 — Critical (CVSS 9.8): A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used…
CVE-2019-11580 — Critical (CVSS 9.8): Atlassian Crowd and Crowd Data Center had the pdkinstall development plugin incorrectly enabled in release builds.…
CVE-2016-6496 — Critical (CVSS 9.8): The LDAP directory connector in Atlassian Crowd before 2.8.8 and 2.9.x before 2.9.5 allows remote attackers to execute…
CVE-2012-2926 — Critical (CVSS 9.1): Atlassian JIRA before 5.0.1; Confluence before 3.5.16, 4.0 before 4.0.7, and 4.1 before 4.1.10; FishEye and Crucible…
CVE-2023-22521 — High (CVSS 8.8): This High severity RCE (Remote Code Execution) vulnerability was introduced in version 3.4.6 of Crowd Data Center and…

All CVEs affecting Atlassian Crowd →

Other CWE-384 (Session Fixation) vulnerabilities

CVE-2024-11317 — Critical (CVSS 10.0): Session Fixation vulnerabilities allow an attacker to fix a users session identifier before login providing an…
CVE-2024-38513 — Critical (CVSS 10.0): Fiber is an Express-inspired web framework written in Go A vulnerability present in versions prior to 2.52.5 is a…
CVE-2021-20151 — Critical (CVSS 10.0): Trendnet AC2600 TEW-827DRU version 2.08B01 contains a flaw in the session management for the device. The router's…
CVE-2026-18527 — Critical (CVSS 9.9): IBM Administration Runtime Expert for i 1R1M0 IBM Application Runtime Expert (ARE) for i could allow a remote attacker…
CVE-2026-102489 — Critical (CVSS 9.8): Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the…
CVE-2026-92609 — Critical (CVSS 9.8): Session fixation in HTTP management authentication allows remote attackers to gain unauthorized access to an…

Browse all CWE-384 (Session Fixation) vulnerabilities →