How severe is CVE-2021-33495?

CVE-2021-33495 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-33495 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33495?

CVE-2021-33495 affects Open-xchange Ox App Suite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33495?

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

When was CVE-2021-33495 published?

CVE-2021-33495 was published on 2021-11-22 and last updated on 2026-06-17.

CVE-2021-33495

CVE-2021-33495 is a medium-severity vulnerability in Open-xchange Ox App Suite with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Open-xchange Ox App Suite
Published: 2021-11-22
Last modified: 2026-06-17

Description

OX App Suite 7.10.5 allows XSS via an OX Chat system message.

Frequently asked questions

What is CVE-2021-33495?: OX App Suite 7.10.5 allows XSS via an OX Chat system message.
How severe is CVE-2021-33495?: CVE-2021-33495 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-33495 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33495?: CVE-2021-33495 affects Open-xchange Ox App Suite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33495?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33495 published?: CVE-2021-33495 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:7.10.5:*:*:*:*:*:*:*

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