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CVE-2018-13400

19
FAUCET Score

CVE-2018-13400 is an improper access control vulnerability affecting multiple versions of Atlassian Jira and Jira Server. This flaw allows a remote attacker, who has already compromised an administrator's session, to bypass "WebSudo" re-authentication and access certain administrative resources. Rated as Medium severity with a CVSS score of 4.7, the vulnerability requires high privileges (PR:H) but has low impact on confidentiality, integrity, and availability (C:L/I:L/A:L). There is currently no known public exploit code (Metasploit, Nuclei, ExploitDB) available, and it is not listed on CISA's KEV catalog. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.6.9CPE matchmatch criteria
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
>= 7.7.0, < 7.7.5CPE matchmatch criteria
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
>= 7.8.0, < 7.8.5CPE matchmatch criteria
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
>= 7.9.0, < 7.9.3CPE matchmatch criteria
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
>= 7.10.0, < 7.10.3CPE matchmatch criteria
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.7MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.2
Impact Score
3.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.44%
Probability of exploitation in next 30 days
EPSS Percentile
70.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0144 is in the 78th percentile among its peer group of 3,565 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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/JRASERVER-68138
Issue TrackingVendor Advisory
securityfocus.com / bid/105751
Third Party AdvisoryVDB Entry