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CVE-2018-9839

22
FAUCET Score

CVE-2018-9839 is a medium-severity vulnerability affecting MantisBT versions through 1.3.14 and 2.0.0. It allows a user with REPORTER access or higher to view private issue details by crafting a specific request during the bug cloning process. If the 'Copy issue notes' and 'Copy attachments' checkboxes are selected, this private data can then be made public, excluding private notes. The vulnerability has a CVSS score of 6.5 (Medium) due to its network attack vector and high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.14CPE matchmatch criteria
cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:mantisbt:mantisbt:2.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 80th percentile among its peer group of 21,974 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / mantisbt/mantisbt/commit/1fbcd9bca2f2c77cb61624d36ddee4b3802c38ea
PatchThird Party Advisory
mantisbt.org / bugs/view.php
ExploitIssue TrackingThird Party Advisory