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CVE-2025-53690· NVD / CVE Program· CNA Wiz

Sitecore Products ViewState Deserialization Vulnerability

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.

CriticalCVSS 9.0 · v3.1KEVWeaponized No fix recorded

Noroxi analysis

No Noroxi analysis for this record yet

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Published
Sep 3, 2025
Updated
Jun 17, 2026
EPSS
51.1% · 99th percentile
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Report tools

JSON

Action score

81

Now

Patch today or shut off access.

CVSS
36 / 40 · 9.0 / 10
CISA KEV
30 / 30 · Listed
EPSS
15 / 30 · 51.1%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Wiz
9.0
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Sep 4, 2025. That signals real attacks, not theory.

Remediation deadline for government agencies: Sep 25, 2025.

Affected systems

VendorProduct
sitecoreexperience commerce
sitecoreexperience manager
sitecoreexperience platform
sitecoremanaged cloud

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sitecore experience commerceup to 9.0 inclusive
  • sitecore experience managerup to 9.0 inclusive
  • sitecore experience platformup to 9.0 inclusive
  • sitecore managed cloudall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Wiz). Independent of NVD's CPE analysis and usually ahead of it.

  • Sitecore Experience Manager (XM)

    • up to and including 9.0affected · semver

  • Sitecore Experience Platform (XP)

    • up to and including 9.0affected · semver

Same product

sitecore: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-35813Multiple Sitecore products allow remote code execution.
    65This week
  • CVE-2025-34509Sitecore XM and XP Hardcoded Credentials
    47Plan
  • CVE-2025-34511Sitecore PowerShell Extension RCE via Unrestricted Upload
    44Plan
  • CVE-2024-46938An issue was discovered in Sitecore Experience Platform (XP), Experience Manager (XM), and Experience Commerce (XC) 8.0 Initial Release thro
    44Plan
  • CVE-2025-53693HTML Cache Poisoning through Unsafe Reflections
    43Plan
  • CVE-2025-34510Sitecore XM, XC, and XP Post-Auth RCE via Zip Slip
    42Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:52025-09-04
Proof-of-concept repository on GitHubstars:32025-09-07
Proof-of-concept repository on GitHubstars:82025-11-05

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoCsame day
  3. CISA KEVsame day
  4. TodaySep 30, 2026+392 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-536910 days apartSitecore Experience Remote Code Execution through Insecure Deserialization
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python
payload = sock.recv(65536)job = pickle.loads(payload)

Fixed

python
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig):    raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records