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CVE-2018-9998

22
FAUCET Score

CVE-2018-9998 is an information disclosure vulnerability affecting Open-Xchange OX App Suite versions prior to 7.6.3-rev37, 7.8.2-rev40, 7.8.3-rev48, and 7.8.4-rev28. This flaw allows authenticated remote attackers to obtain sensitive folder names by observing API error responses when manipulating the "folder" parameter in an "all" action to api/tasks. Rated as Medium severity (CVSS 6.5), it requires low privileges and network access, potentially leading to high confidentiality impact without affecting integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.6.3CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:*:*:*:*:*:*:*:*
7.6.3CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev14:*:*:*:*:*:*
7.6.3CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev15:*:*:*:*:*:*
7.6.3CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev16:*:*:*:*:*:*
7.6.3CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev17:*:*:*:*:*:*

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
1.83%
Probability of exploitation in next 30 days
EPSS Percentile
76.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0183 is in the 89th percentile among its peer group of 21,958 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

Remediation records are not available for this CVE.

References

seclists.org / fulldisclosure/2018/Jul/12
Mailing ListThird Party Advisory
securitytracker.com / id/1041213
Third Party AdvisoryVDB Entry