Description
YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the request to commence a site backup can be performed and downloaded without authentication. The archives are created with a predictable filename, so a malicious user could create and download an archive without being authenticated. This could result in a malicious attacker making numerous requests to create archives and fill up the file system, or by downloading the archive which contains sensitive site information. This issue has been patched in version 4.5.4.
References (2)
Core 2
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-wc9g-6j9w-hr95
Scores
CVSS v3
10.0
EPSS
0.0044
EPSS Percentile
63.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-862
CWE-287
Status
published
Products (2)
yeswiki/yeswiki
< 4.5.4
yeswiki/yeswiki
0 - 4.5.4Packagist
Published
Apr 29, 2025
Tracked Since
Feb 18, 2026