How severe is CVE-2018-9998?

CVE-2018-9998 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-9998 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9998?

CVE-2018-9998 primarily affects Open-xchange Open-xchange Appsuite. In total, 89 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-9998?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-9998 published?

CVE-2018-9998 was published on 2018-07-05 and last updated on 2026-06-17.

CVE-2018-9998

CVE-2018-9998 is a medium-severity vulnerability in Open-xchange Open-xchange Appsuite with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Open-xchange Open-xchange Appsuite
Published: 2018-07-05
Last modified: 2026-06-17

Description

Open-Xchange OX App Suite before 7.6.3-rev37, 7.8.x before 7.8.2-rev40, 7.8.3 before 7.8.3-rev48, and 7.8.4 before 7.8.4-rev28 include folder names in API error responses, which allows remote attackers to obtain sensitive information via the folder parameter in an "all" action to api/tasks.

Frequently asked questions

What is CVE-2018-9998?: Open-Xchange OX App Suite before 7.6.3-rev37, 7.8.x before 7.8.2-rev40, 7.8.3 before 7.8.3-rev48, and 7.8.4 before 7.8.4-rev28 include folder names in API error responses, which allows remote attackers to obtain sensitive information via the folder parameter in an "all" action to api/tasks.
How severe is CVE-2018-9998?: CVE-2018-9998 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-9998 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9998?: CVE-2018-9998 primarily affects Open-xchange Open-xchange Appsuite. In total, 89 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-9998?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-9998 published?: CVE-2018-9998 was published on 2018-07-05 and last updated on 2026-06-17.

References

Affected products (89)

cpe:2.3:a:open-xchange:open-xchange_appsuite:*:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev14:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev15:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev16:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev17:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev18:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev20:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev22:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev23:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev24:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev25:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev26:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev28:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev29:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev30:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev31:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev32:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev33:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev35:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.6.3:rev36:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.0:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.2:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev10:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev11:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev12:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev13:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev14:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev15:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev16:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev17:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev18:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev19:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev20:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev21:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev22:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev23:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev24:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev25:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.3:rev26:*:*:*:*:*:*

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