Zammad: Remote image tracking bypass via shortened URL scheme
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| zammad | zammad | affected |
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No data.
No data.
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| Zammad | Zammad |
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No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.279% probability within 30 days)
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| First Time appeared |
Zammad
Zammad zammad |
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| Vendors & Products |
Zammad
Zammad zammad |
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| Metrics |
ssvc
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| Description | Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, zammad's HTML sanitizer, which blocks remote images in ticket articles and email views, can be bypassed using a shortened URL format that omits the double slash after the scheme (for example a shortened HTTP URL instead of a shortened HTTP URL). Modern browsers treat both forms as equivalent remote URLs. As a result, an attacker who sends a crafted email or ticket can cause the recipient's browser to silently load an image from an external server, revealing when and by whom the ticket was opened. Zammad's "remote content blocked" warning is not shown because the sanitizer does not recognize the shortened form as remote. This issue is fixed in version 7.1.2. | |
| Title | Zammad: Remote image tracking bypass via shortened URL scheme | |
| Weaknesses | CWE-184 CWE-20 |
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| References |
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| Metrics |
cvssV4_0
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