CVE-2025-53690 (GCVE-0-2025-53690)

Vulnerability from cvelistv5 – Published: 2025-09-03 20:04 – Updated: 2026-02-26 17:49
VLAI CISA Previdian
Title
Sitecore Products ViewState Deserialization Vulnerability
Summary
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.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-05 03:55 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Wiz CNA under the mitre root
CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
Sitecore Experience Manager (XM) Affected: 0 , ≤ 9.0 (semver)
guessed Create a notification for this product.
Sitecore Experience Platform (XP) Affected: 0 , ≤ 9.0 (semver)
guessed Create a notification for this product.
Date Public
2025-09-03 18:00
Credits
Mandiant Threat Defense
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 09bc0f3e-bcb8-43d3-969f-64a5dcf24ba5

Vulnerability ID: CVE-2025-53690

Status: Confirmed

Status Updated: 2025-09-04 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-09-04
Asserted: 2025-09-04
Scope
Notes: Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability | Affected: Sitecore / Multiple Products | Description: 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. | 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. | Due date: 2025-09-25 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53690
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-502
Feed CISA Known Exploited Vulnerabilities Catalog
Product Multiple Products
Due Date 2025-09-25
Date Added 2025-09-04
Vendorproject Sitecore
Vulnerabilityname Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:25 UTC | Updated: 2026-11-13 21:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 57171655-5746-48b4-938b-208cfb8ea3a5

Vulnerability ID: CVE-2025-53690

Status: Confirmed

Status Updated: 2026-06-01 10:40 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: Sitecore Products ViewState Deserialization Vulnerability | Affected: Sitecore / Experience Manager (XM), Experience Platform (XP) | CVSS: 9.0 (CRITICAL) | EPSS: 0.26308 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Sitecore Products ViewState Deserialization Vulnerability
Vendor Sitecore
Product Experience Manager (XM), Experience Platform (XP)
Added Date 2026-06-01T10:40:06.074Z
Cvss Score 9.0
Epss Score 0.26308
Cvss Severity CRITICAL
Epss Percentile 0.97738
Used In Malware unknown
Ahead Of Cisa Kev 
{
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  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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              "url": "https://support.sitecore.com/kb?id=kb_article_view\u0026sysparm_article=KB1003865"
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          ],
          "source": {
            "discovery": "USER"
          },
          "title": "Sitecore Products ViewState Deserialization Vulnerability",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9947ef80-c5d5-474a-bbab-97341a59000e",
        "assignerShortName": "Wiz",
        "cveId": "CVE-2025-53690",
        "datePublished": "2025-09-03T20:04:48.223Z",
        "dateReserved": "2025-07-08T14:21:02.028Z",
        "dateUpdated": "2025-10-21T22:45:18.827Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Configurations

CNA · Wiz
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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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.