CVE-2023-3550
Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- EPSS
- 1.15% probability · 65th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- mediawiki/mediawiki · debian/debian linux
- Source
- help@fluidattacks.com
References
- https://fluidattacks.com/advisories/blondie/Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/11/msg00027.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
- https://www.debian.org/security/2023/dsa-5520Third Party Advisory
- https://www.mediawiki.org/wiki/MediaWiki/Product
- https://fluidattacks.com/advisories/blondie/Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/11/msg00027.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
- https://www.debian.org/security/2023/dsa-5520Third Party Advisory
- https://www.mediawiki.org/wiki/MediaWiki/Product
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.