CASCACascade Atlas

Evidence dossier

CVE-2018-6882

CVE-2018-6882

60.5–80.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.

State
PUBLISHED
Published
Mar 27, 2018
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS23.72%

2026-07-18 · v2026.06.15 · percentile 97.6%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
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CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

mitreoriginal assertion
container

Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.

CISA KEVoriginal assertion
observed_exploitation

Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.237170000000; percentile 0.975640000000

Applicability

Cited product scope

Trace impact →
n/an/a
[{"status": "affected", "version": "n/a"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*; end excluding 8.7.0supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.0:-:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.1:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.2:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.3:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.4:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.5:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.6:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

6.1
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.