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CVE-2017-8783

17
FAUCET Score

CVE-2017-8783 is a Persistent Cross-Site Scripting (XSS) vulnerability affecting Synacor Zimbra Collaboration Suite (ZCS) versions prior to 8.7.10. This medium-severity flaw (CVSS 5.4) allows an authenticated attacker to inject malicious scripts into the application, which are then executed in the browser of other users, potentially leading to information disclosure or unauthorized actions. While there is no evidence of active exploitation, public exploit code, or significant community discussion, organizations using affected ZCS versions should prioritize patching to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.7.10CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.89%
Probability of exploitation in next 30 days
EPSS Percentile
55.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0089 is in the 90th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

wagopatch availablevia llm_extracted
Fixed in: ['8.7.10']

Vendor Advisories (1)

wagollm-wago-b561b60e7c4d48baLOW

Persistent XSS location

References

bugzilla.zimbra.com / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
bugzilla.zimbra.com / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
wiki.zimbra.com / wiki/Security_Center
PatchVendor Advisory
wiki.zimbra.com / wiki/Zimbra_Security_Advisories
Vendor Advisory