How severe is CVE-2020-12643?

CVE-2020-12643 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-12643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12643?

CVE-2020-12643 affects Open-xchange Open-xchange Appsuite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12643?

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

When was CVE-2020-12643 published?

CVE-2020-12643 was published on 2020-08-31 and last updated on 2026-06-17.

CVE-2020-12643

CVE-2020-12643 is a medium-severity vulnerability in Open-xchange Open-xchange Appsuite with a CVSS 3.x base score of 4.3. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Open-xchange Open-xchange Appsuite
Published: 2020-08-31
Last modified: 2026-06-17

Description

OX App Suite 7.10.3 and earlier has Incorrect Access Control via an /api/subscriptions request for a snippet containing an email address.

Frequently asked questions

What is CVE-2020-12643?: OX App Suite 7.10.3 and earlier has Incorrect Access Control via an /api/subscriptions request for a snippet containing an email address.
How severe is CVE-2020-12643?: CVE-2020-12643 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-12643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12643?: CVE-2020-12643 affects Open-xchange Open-xchange Appsuite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12643?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12643 published?: CVE-2020-12643 was published on 2020-08-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open-xchange:open-xchange_appsuite:*:*:*:*:*:*:*:*

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.
CVE-2020-12645 — Critical (CVSS 9.8): OX App Suite 7.10.1 to 7.10.3 has improper input validation for rate limits with a crafted User-Agent header, spoofed…
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.

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