Exploitation evidence
Known exploited · CISA KEV listed
Added 2025-09-04. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: 2025-09-25. 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
Sitecore / Experience Manager (XM)
Default status: unaffected
- affected: 0 to ≤ 9.0 (semver)
Sitecore / Experience Platform (XP)
Default status: unaffected
- affected: 0 to ≤ 9.0 (semver)
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
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": 0.6071,
"percentile": 0.99161
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.6071,
"percentile": 0.99156
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.6071,
"percentile": 0.99154
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.6071,
"percentile": 0.99154
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.6071,
"percentile": 0.99154
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.6071,
"percentile": 0.99153
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.6071,
"percentile": 0.99152
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.6071,
"percentile": 0.99151
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.6071,
"percentile": 0.99149
}03 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
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"other": {
"content": {
"id": "CVE-2025-53690",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-05T03:55:32.553435Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-09-04",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690"
},
"type": "kev"
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}
],
"providerMetadata": {
"dateUpdated": "2026-02-26T17:49:44.363Z",
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"time": "2025-09-04T00:00:00.000Z",
"value": "CVE-2025-53690 added to CISA KEV"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
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"product": "Experience Manager (XM)",
"vendor": "Sitecore",
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],
"configurations": [
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"value": "<span style=\"background-color: rgb(254, 254, 254);\">Customers who followed the deployment instructions provided with XP 9.0 or earlier and Active Directory 1.4 or earlier and used the sample machine key (for example, machine key: BDDFE367CD..., validation key: 0DAC68D020...) are vulnerable.</span><br>"
}
],
"value": "Customers who followed the deployment instructions provided with XP 9.0 or earlier and Active Directory 1.4 or earlier and used the sample machine key (for example, machine key: BDDFE367CD..., validation key: 0DAC68D020...) are vulnerable."
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"credits": [
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"datePublic": "2025-09-03T18:00:00.000Z",
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"value": "Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.<p>This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0.</p>"
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],
"value": "Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0."
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"capecId": "CAPEC-242",
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"metrics": [
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"baseScore": 9,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
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"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
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],
"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502 Deserialization of Untrusted Data",
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"type": "CWE"
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],
"providerMetadata": {
"dateUpdated": "2025-09-03T20:04:48.223Z",
"orgId": "9947ef80-c5d5-474a-bbab-97341a59000e",
"shortName": "Wiz"
},
"references": [
{
"url": "https://cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability"
},
{
"url": "https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865"
}
],
"source": {
"discovery": "USER"
},
"title": "Sitecore Products ViewState Deserialization Vulnerability",
"x_generator": {
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"cveId": "CVE-2025-53690",
"datePublished": "2025-09-03T20:04:48.223Z",
"dateReserved": "2025-07-08T14:21:02.028Z",
"dateUpdated": "2026-02-26T17:49:44.363Z",
"state": "PUBLISHED"
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"dataVersion": "5.2"
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.60601,
"percentile": 0.99146
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2025-53690",
"cwes": [
"CWE-502"
],
"dateAdded": "2025-09-04",
"dueDate": "2025-09-25",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53690",
"product": "Multiple Products",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution. ",
"vendorProject": "Sitecore",
"vulnerabilityName": "Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability"
}