What it is
CVE-2022-24682 is an unauthenticated vulnerability affecting Zimbra Collaboration Suite. An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2022-24682
Collaboration Suite
Zimbra / Collaboration Suite
- Severity
- CVSS 6.1 · Medium
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 30.9%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Zimbra / Collaboration Suite.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Collaboration Suite
An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes.
This markup becomes unescaped, causing arbitrary markup to be injected into the document.
- Published
- 09 Feb 2022
- Exploitation Reported
- 25 Feb 2022
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
Tags
cisa
java
nuclei_scanner
ransomware
malware
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2022-24682
- wiki.zimbra.com/wiki/Zimbra_Security_Advisories wiki.zimbra.com · CVE Record https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- wiki.zimbra.com/wiki/Security_Center wiki.zimbra.com · CVE Record https://wiki.zimbra.com/wiki/Security_Center
- volexity.com/blog/2022/02/03/operation-emailthief-active-... volexity.com · CVE Record https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-...
- blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-... blog.zimbra.com · CVE Record https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-e...
- wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30 wiki.zimbra.com · CVE Record https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Used in malware
CISA
Malware families have been linked to exploitation of this CVE.
Proof of concept available
Nuclei Templates
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2022-02-25 00:00 UTC |
| CVE | 2026-08-06 04:30 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nuclei template detected 01 Jun 2026.
View Nuclei template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2022/CVE-2022-24682.yaml | 01 Jun 2026 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
6.1
Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
30.9%
All CVSS Scores
CVSS v3.1
6.1
Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v2.0
4.3
Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
Zimbra Collaboration Suite < 8.8.15 - Improper Encoding
nuclei · Created Unknown
Timeline
From disclosure to observed exploitation
-
KEV confirmed by CVE
Exploitation attested by an external source
-
Public PoC available
Public proof-of-concept code published
-
Nuclei template available
Scanner coverage available
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
First public exploitation report
Exploit observed in malware
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2022-24682
Free JSON includes basic KEV fields{
"cve_id": "CVE-2022-24682",
"confidence": "Confirmed",
"cvss_score": 6.1,
"cvss_estimated": false,
"epss_score": 0.30931,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.