150 lines
6.6 KiB
JSON
150 lines
6.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-93628",
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"assignerOrgId": "9974b330-7714-4307-a722-5648477acda7",
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"state": "PUBLISHED",
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"assignerShortName": "rapid7",
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"dateReserved": "2026-09-18T12:22:34.911Z",
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"datePublished": "2026-10-23T13:18:16.368Z",
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"dateUpdated": "2026-10-28T20:02:01.885Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "9974b330-7714-4307-a722-5648477acda7",
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"shortName": "rapid7",
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"dateUpdated": "2026-10-23T13:18:16.368Z"
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},
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"title": "Zimbra Collaboration Suite Calendar Processing Authentication Bypass via Forged iCalendar REPLY Attendee Response",
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"datePublic": "2026-10-23T12:46:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-290",
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"description": "CWE-290 Authentication bypass by spoofing",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Zimbra",
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"product": "Zimbra Collaboration Suite",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThanOrEqual": "10.1.21",
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"versionType": "semver"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "An attendee authentication vulnerability in the email calendar processing of Zimbra Collaboration Suite (ZCS) allows an unauthenticated sender to forge another attendee's response to an existing meeting. Zimbra passes a null sender identity when processing iCalendar REPLY components, causing the attendee authorization filter to be skipped. An attacker who knows the meeting UID, organizer address and attendee address can send a non-outdated reply that changes the attendee's participation status in the organizer's calendar. The change occurs automatically during delivery without organizer or attendee interaction. ZCS 10.1.16 and 10.1.21 are affected.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "An attendee authentication vulnerability in the email calendar processing of Zimbra Collaboration Suite (ZCS) allows an unauthenticated sender to forge another attendee's response to an existing meeting. Zimbra passes a null sender identity when processing iCalendar REPLY components, causing the attendee authorization filter to be skipped. An attacker who knows the meeting UID, organizer address and attendee address can send a non-outdated reply that changes the attendee's participation status in the organizer's calendar. The change occurs automatically during delivery without organizer or attendee interaction. ZCS 10.1.16 and 10.1.21 are affected."
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}
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]
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}
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],
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"references": [
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{
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"url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories",
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"tags": [
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"vendor-advisory"
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]
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},
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{
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"url": "https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/",
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"tags": [
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"related"
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "LOW",
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"availabilityImpact": "NONE",
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"baseSeverity": "MEDIUM",
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"baseScore": 5.3,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
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}
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Jonah Burgess (CryptoCat), Senior Security Researcher, Rapid7",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-28T18:23:55.530504Z",
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"id": "CVE-2026-93628",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-28T20:02:01.885Z"
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}
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}
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]
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}
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} |