How severe is CVE-2023-50883?

CVE-2023-50883 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-2023-50883 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50883?

CVE-2023-50883 affects Onlyoffice Document Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50883?

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

Does CVE-2023-50883 have an EU (EUVD) identifier?

Yes. CVE-2023-50883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-55616.

When was CVE-2023-50883 published?

CVE-2023-50883 was published on 2024-09-09 and last updated on 2026-06-17.

CVE-2023-50883

CVE-2023-50883 is a medium-severity vulnerability in Onlyoffice Document Server 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)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-55616
Weakness: CWE-79
Affected product: Onlyoffice Document Server
Published: 2024-09-09
Last modified: 2026-06-17

Description

ONLYOFFICE Docs before 8.0.1 allows XSS because a macro is an immediately-invoked function expression (IIFE), and therefore a sandbox escape is possible by directly calling the constructor of the Function object. NOTE: this issue exists because of an incorrect fix for CVE-2021-43446.

Frequently asked questions

What is CVE-2023-50883?: ONLYOFFICE Docs before 8.0.1 allows XSS because a macro is an immediately-invoked function expression (IIFE), and therefore a sandbox escape is possible by directly calling the constructor of the Function object. NOTE: this issue exists because of an incorrect fix for CVE-2021-43446.
How severe is CVE-2023-50883?: CVE-2023-50883 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-2023-50883 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50883?: CVE-2023-50883 affects Onlyoffice Document Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50883?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-50883 have an EU (EUVD) identifier?: Yes. CVE-2023-50883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-55616.
When was CVE-2023-50883 published?: CVE-2023-50883 was published on 2024-09-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:*

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