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CVE-2018-20238

23
FAUCET Score

CVE-2018-20238 describes an insufficient session expiration vulnerability in Atlassian Crowd versions before 3.2.7 and from 3.3.0 before 3.3.4. This flaw allows remote attackers to authenticate using expired user sessions through various REST resources. With a CVSS score of 8.1 (High), the vulnerability is easily exploitable over the network with low privileges, potentially leading to high confidentiality and integrity impacts. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.7CPE matchmatch criteria
cpe:2.3:a:atlassian:crowd:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.3.4CPE matchmatch criteria
cpe:2.3:a:atlassian:crowd:*:*:*:*:*:*:*:*
< 3.3.4CPE match
cpe:2.3:a:atlassian:crowd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 70th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jira.atlassian.com / browse/CWD-5361
Vendor Advisory
securityfocus.com / bid/107036
Third Party AdvisoryVDB Entry