How severe is CVE-2026-40105?

CVE-2026-40105 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-2026-40105 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40105?

CVE-2026-40105 affects Xwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40105?

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

Does CVE-2026-40105 have an EU (EUVD) identifier?

Yes. CVE-2026-40105 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22819.

When was CVE-2026-40105 published?

CVE-2026-40105 was published on 2026-04-15 and last updated on 2026-06-17.

CVE-2026-40105

CVE-2026-40105 is a medium-severity vulnerability in Xwiki 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-80.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 6.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22819
Weakness: CWE-80
Affected product: Xwiki
Published: 2026-04-15
Last modified: 2026-06-17

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Versions 10.4-rc-1, through 16.10.15, 17.0.0-rc-1, through 17.4.7 and 17.5.0-rc-1 through 17.10.0 contain a reflected cross-site scripting vulnerability (XSS) in the comparison view between revisions of a page allows executing JavaScript code in the user's browser. If the current user is an admin, this can not only affect the current user but also the confidentiality, integrity and availability of the whole XWiki instance. If developers are unable to update immediately, they can apply the patch manually to templates/changesdoc.vm in the deployed WAR.

Frequently asked questions

What is CVE-2026-40105?: XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Versions 10.4-rc-1, through 16.10.15, 17.0.0-rc-1, through 17.4.7 and 17.5.0-rc-1 through 17.10.0 contain a reflected cross-site scripting vulnerability (XSS) in the comparison view between revisions of a page allows executing JavaScript code in the user's browser. If the current user is an admin, this can not only affect the current user but also the confidentiality, integrity and availability of the whole XWiki instance. If developers are unable to update immediately, they can apply the patch manually to templates/changesdoc.vm in the deployed WAR.
How severe is CVE-2026-40105?: CVE-2026-40105 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-2026-40105 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40105?: CVE-2026-40105 affects Xwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40105?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40105 have an EU (EUVD) identifier?: Yes. CVE-2026-40105 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22819.
When was CVE-2026-40105 published?: CVE-2026-40105 was published on 2026-04-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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