How severe is CVE-2023-35166?

CVE-2023-35166 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-35166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-35166?

CVE-2023-35166 affects Xwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-35166?

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

When was CVE-2023-35166 published?

CVE-2023-35166 was published on 2023-06-20 and last updated on 2026-06-17.

CVE-2023-35166

CVE-2023-35166 is a critical-severity vulnerability in Xwiki with a CVSS 3.x base score of 9.9. Its EPSS exploit-prediction score of 63% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 63% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Xwiki
Published: 2023-06-20
Last modified: 2026-06-17

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It's possible to execute any wiki content with the right of the TipsPanel author by creating a tip UI extension. This has been patched in XWiki 15.1-rc-1 and 14.10.5.

Frequently asked questions

What is CVE-2023-35166?: XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It's possible to execute any wiki content with the right of the TipsPanel author by creating a tip UI extension. This has been patched in XWiki 15.1-rc-1 and 14.10.5.
How severe is CVE-2023-35166?: CVE-2023-35166 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-35166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 63% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-35166?: CVE-2023-35166 affects Xwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-35166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-35166 published?: CVE-2023-35166 was published on 2023-06-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*

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