How severe is CVE-2020-8543?

CVE-2020-8543 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-8543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8543?

CVE-2020-8543 primarily affects Open-xchange Open-xchange Appsuite. In total, 125 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8543?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-8543 published?

CVE-2020-8543 was published on 2020-06-16 and last updated on 2026-06-17.

CVE-2020-8543

CVE-2020-8543 is a high-severity vulnerability in Open-xchange Open-xchange Appsuite with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Open-xchange Open-xchange Appsuite
Published: 2020-06-16
Last modified: 2026-06-17

Description

OX App Suite through 7.10.3 has Improper Input Validation.

Frequently asked questions

What is CVE-2020-8543?: OX App Suite through 7.10.3 has Improper Input Validation.
How severe is CVE-2020-8543?: CVE-2020-8543 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-8543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8543?: CVE-2020-8543 primarily affects Open-xchange Open-xchange Appsuite. In total, 125 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-8543 published?: CVE-2020-8543 was published on 2020-06-16 and last updated on 2026-06-17.

References

Affected products (125)

cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev1:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev10:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev11:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev12:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev13:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev14:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev15:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev16:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev17:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev18:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev19:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev2:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev20:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev21:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev22:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev23:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev24:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev25:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev26:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev27:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev28:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev29:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev3:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev30:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev31:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev32:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev33:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev34:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev35:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev36:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev37:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev38:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev39:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev4:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev40:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev41:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev42:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev43:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.8.4:rev44:*:*:*:*:*:*

More vulnerabilities in Open-xchange Open-xchange Appsuite

CVE-2017-13667 — Critical (CVSS 9.9): OX Software GmbH OX App Suite 7.8.4 and earlier is affected by: SSRF.
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CVE-2019-7158 — Critical (CVSS 9.8): OX App Suite 7.10.0 and earlier has Incorrect Access Control.
CVE-2017-5212 — Critical (CVSS 9.8): Open-Xchange GmbH OX App Suite 7.8.3 is affected by: Incorrect Access Control.
CVE-2017-5210 — Critical (CVSS 9.8): Open-Xchange GmbH OX App Suite 7.8.3 and earlier is affected by: Information Exposure.
CVE-2017-17060 — Critical (CVSS 9.8): OX Software GmbH OX App Suite 7.8.4 and earlier is affected by: Insecure Permissions.

All CVEs affecting Open-xchange Open-xchange Appsuite →

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