How severe is CVE-2021-38376?

CVE-2021-38376 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-38376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38376?

CVE-2021-38376 affects Open-xchange Ox App Suite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38376?

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

When was CVE-2021-38376 published?

CVE-2021-38376 was published on 2021-11-22 and last updated on 2026-06-17.

CVE-2021-38376

CVE-2021-38376 is a medium-severity vulnerability in Open-xchange Ox App Suite with a CVSS 3.x base score of 5.3. 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Open-xchange Ox App Suite
Published: 2021-11-22
Last modified: 2026-06-17

Description

OX App Suite through 7.10.5 has Incorrect Access Control for retrieval of session information via the rampup action of the login API call.

Frequently asked questions

What is CVE-2021-38376?: OX App Suite through 7.10.5 has Incorrect Access Control for retrieval of session information via the rampup action of the login API call.
How severe is CVE-2021-38376?: CVE-2021-38376 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-38376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38376?: CVE-2021-38376 affects Open-xchange Ox App Suite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38376?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38376 published?: CVE-2021-38376 was published on 2021-11-22 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Open-xchange Ox App Suite

CVE-2022-29851 — Critical (CVSS 9.8): documentconverter in OX App Suite through 7.10.6, in a non-default configuration with ghostscript, allows OS Command…
CVE-2022-24405 — Critical (CVSS 9.8): OX App Suite through 7.10.6 allows OS Command Injection via a serialized Java class to the Documentconverter API.
CVE-2022-23100 — Critical (CVSS 9.8): OX App Suite through 7.10.6 allows OS Command Injection via Documentconverter (e.g., through an email attachment).
CVE-2023-29048 — High (CVSS 8.8): A component for parsing OXMF templates could be abused to execute arbitrary system commands that would be executed as…
CVE-2023-29051 — High (CVSS 8.1): User-defined OXMF templates could be used to access a limited part of the internal OX App Suite Java API. The existing…
CVE-2023-29050 — High (CVSS 7.6): The optional "LDAP contacts provider" could be abused by privileged users to inject LDAP filter strings that allow to…

All CVEs affecting Open-xchange Ox App Suite →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →