Zimbra Collaboration Suite Briefcase CSS Sanitization Bypass via Non-ASCII Stylesheet Characters
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite | unaffected |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.234% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Synacor
Synacor zimbra Collaboration Suite |
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| CPEs | cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Synacor
Synacor zimbra Collaboration Suite |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Zimbra
Zimbra zimbra Collaboration Suite |
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| Vendors & Products |
Zimbra
Zimbra zimbra Collaboration Suite |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A CSS sanitization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user with Briefcase access to publish a document that displays attacker-controlled content under the Zimbra origin. When processing a stylesheet containing non-ASCII characters, DefangFilter appends the final ASCII segment without sanitizing it. HTML stored as application/x-zimbra-doc can therefore retain CSS URL references that the normal sanitizer removes. An attacker can share a crafted document that loads external resources and displays a credential-collection form using Zimbra's own visual assets. Exploitation requires the victim to open the document in a browser that renders the content type inline; credential theft additionally requires form submission. ZCS 10.1.16 and 10.1.20 are affected. | |
| Title | Zimbra Collaboration Suite Briefcase CSS Sanitization Bypass via Non-ASCII Stylesheet Characters | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV3_1
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