CVE-2023-26478
This class is not supported to be exposed to users without the `programing` right. `com.xpn.xwiki.api.Attachment` should be used instead and takes case of checking the user's rights before performing dangerous operations.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
XWiki Platform is a generic wiki platform. Starting in version 14.3-rc-1, `org.xwiki.store.script.TemporaryAttachmentsScriptService#uploadTemporaryAttachment` returns an instance of `com.xpn.xwiki.doc.XWikiAttachment`. This class is not supported to be exposed to users without the `programing` right. `com.xpn.xwiki.api.Attachment` should be used instead and takes case of checking the user's rights before performing dangerous operations. This has been patched in versions 14.9-rc-1 and 14.4.6. There are no known workarounds for this issue.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.67% probability · 51th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-749
- Affected
- xwiki/xwiki
- Source
- security-advisories@github.com
EPSS 0.7% since 10 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/xwiki/xwiki-platform/commit/3c73c59e39b6436b1074d8834cf276916010014dPatch
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-8692-g6g9-gm5pVendor Advisory
- https://jira.xwiki.org/browse/XWIKI-20180Exploit, Issue Tracking, Vendor Advisory
- https://github.com/xwiki/xwiki-platform/commit/3c73c59e39b6436b1074d8834cf276916010014dPatch
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-8692-g6g9-gm5pVendor Advisory
- https://jira.xwiki.org/browse/XWIKI-20180Exploit, Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.