Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-04-19. Ransomware campaign use: Known.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-05-10. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
n/a / n/a
Default status: Not specified
- affected: n/a
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- http://seclists.org/fulldisclosure/2018/Mar/52
- https://www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7
- https://bugzilla.zimbra.com/show_bug.cgi?id=108786
- http://www.securityfocus.com/archive/1/541891/100/0/threaded
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6882
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.29761,
"percentile": 0.98225
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.29761,
"percentile": 0.98213
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.29761,
"percentile": 0.98211
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.29761,
"percentile": 0.9821
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.29761,
"percentile": 0.98209
}07 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
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},
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"url": "https://bugzilla.zimbra.com/show_bug.cgi?id=108786"
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],
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{
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"baseScore": 6.1,
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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
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"scope": "CHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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},
{
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"timestamp": "2026-08-13T03:55:36.807021Z",
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],
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],
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"cna": {
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],
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{
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}
],
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],
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},
{
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},
{
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"url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7"
},
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},
{
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],
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],
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},
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},
{
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},
{
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},
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},
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"cveId": "CVE-2018-6882",
"datePublished": "2018-03-27T16:00:00.000Z",
"dateReserved": "2018-02-09T00:00:00.000Z",
"dateUpdated": "2026-10-01T19:33:16.504Z",
"state": "PUBLISHED"
},
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}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.29761,
"percentile": 0.98207
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.29761,
"percentile": 0.98206
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.29761,
"percentile": 0.98205
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.29761,
"percentile": 0.98201
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.29761,
"percentile": 0.98198
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2018-6882",
"cwes": [
"CWE-79"
],
"dateAdded": "2022-04-19",
"dueDate": "2022-05-10",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-6882",
"product": "Zimbra Collaboration Suite (ZCS)",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.",
"vendorProject": "Synacor",
"vulnerabilityName": "Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability"
}