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Adobe Experience Manager CVE-2025-64594

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2025-12-10 psirt@adobe.com
5.4
CVSS 3.1 · Vendor: adobe
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as low-privileged AEM user
  2. Delivery
    Inject script into vulnerable form field
  3. Exploit
    Payload stored in AEM
  4. Execution
    Victim browses affected page
  5. Impact
    Script executes in victim browser context

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to hold a low-privileged authenticated AEM account with the ability to write to the affected form fields (PR:L), and it requires a separate victim to subsequently browse the page containing the injected field (UI:R) - the payload does not fire on its own. Affected deployments are Adobe Experience Manager 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS. The dual requirement of valid authoring-level credentials plus victim interaction significantly limits realistic exploitation to environments where untrusted or many authors have form-editing access.

Impact

This is a genuinely moderate-priority issue rather than a top-tier emergency, and the multiple signals are consistent with that. The CVSS 3.1 base score is 5.4 (Medium), and the vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N shows a network-reachable, low-complexity flaw that nonetheless requires BOTH low-level authentication (PR:L) AND victim user interaction (UI:R) - two meaningful barriers to mass exploitation. The scope change (S:C) correctly reflects that injected script executes in a victim's browser context (a different security authority than the AEM server), but confidentiality and integrity impact are only Low and availability impact is None. EPSS reinforces the low-urgency read: 0.25% probability at the 15th percentile indicates exploitation is not expected to be widespread or automated. The vulnerability is NOT listed in CISA KEV and no public exploit code was identified in the provided data, so there is no evidence of active exploitation. No SSVC decision data was supplied in the input, so an SSVC-based priority cannot be stated. In short: all available signals (Medium CVSS, low EPSS, no KEV, no POC, dual preconditions of auth + user interaction) agree that this is a real-but-not-critical stored XSS to patch on a normal cycle, not a drop-everything issue.

Exploit ScenarioDerived

A low-privileged authenticated user (e.g., a content author or form editor) injects malicious JavaScript into a vulnerable AEM form field. The payload is stored and later executed in the browser of any victim - such as an administrator or site visitor - who views the page containing that field, enabling session theft or actions in the victim's context. No public proof-of-concept was identified in the provided data.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 14, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier - including AEM Cloud Service and AEM 6.5 LTS - lets an authenticated low-privileged author persist malicious JavaScript into vulnerable form fields, which then executes in the browser of any user who later views the affected page. Because exploitation requires both authoring-level write access and a separate victim who browses the poisoned page, the issue is rated CVSS 5.4 (moderate) rather than critical. There is no CISA KEV listing, no public exploit identified at time of analysis, and EPSS is low at 0.25% (15th percentile), consistent with the credential-plus-victim-interaction prerequisites.

RemediationAI

Apply the Adobe security update referenced in bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html); this is the primary and only complete fix, and because the exact fixed build number is not enumerated in the provided data you should confirm the target release against that bulletin before upgrading 6.5.x on-premises installations or validating that AEM Cloud Service has been auto-updated. Patch available per vendor advisory, so treat the Adobe bulletin as the source of truth for the corrected version rather than assuming 6.5.23 plus an arbitrary increment is sufficient. If immediate upgrading is not possible, the most effective compensating control follows directly from the PR:L prerequisite: tighten authoring permissions so that only a small, trusted set of accounts can create or modify form fields, and remove form-editing capabilities from untrusted or bulk-provisioned author accounts - the trade-off is reduced editorial throughput and possible workflow disruption for content teams. In parallel, audit existing form definitions and authored content for injected script payloads before they are viewed by other users, and consider a restrictive Content-Security-Policy with a narrow script-src on author/publish responses to blunt execution of any residual payloads, accepting that strict CSP can break legitimate inline scripts and older AEM components. Because this is a persistent XSS, blocking a single endpoint or port is not an effective mitigation, and network filtering offers little value against an authenticated authoring-tier injection; detection should instead focus on anomalous form-submission activity in AEM audit logs.

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is a stored (persistent) variant of CWE-79, improper neutralization of input during web page generation, in Adobe Experience Manager's form-field handling. AEM is a Java-based enterprise content management platform split into an authoring tier where content and forms are created, and a publish tier where that content is served to end users; in this case the injected payload is written into a form field through the authoring interface and persisted server-side, so it is not a reflected or self-inflicted bug. AEM normally relies on its built-in cross-site scripting protection and input-filtering framework to sanitize rich-text and form input, so the presence of this CVE indicates a gap or bypass in that sanitization for the specific affected form fields rather than a general failure of the platform's output encoding. The CVSS vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N reflects a network-reachable authoring interface, low attack complexity, a required low-privileged authenticated account, mandatory victim interaction, and a scope change (S:C) because the injected script executes in the victim's browser origin and can act on that user's session beyond the vulnerable form component itself, while direct confidentiality and integrity impact to the server remains low and there is no availability impact. The low EPSS score (0.25%, 15th percentile) is consistent with the PR:L plus UI:R combination, and the provided CPE data confirms coverage of generic AEM 6.x, the AEM Cloud Service track, and the 6.5 LTS channel.

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Severity by source

Vendor (adobe) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
vuln.today AI 5.4 MEDIUM

Stored XSS needs low-privileged author access (PR:L) and a victim to view the page (UI:R); script runs in the victim's browser authority (S:C) with Low C/I and no availability impact.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (adobe).

CVSS VectorVendor: adobe

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionCVE.org

Adobe Experience Manager versions 6.5.23 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.

Threat Intelligence Overview

EPSS Score
0.2%
Top 85% exploitable
Prevalence
High
Widely deployed enterprise CMS/DX platform across large organizations
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
High

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)CVE.org

cpe:2.3:a:adobe:experience_manager:*:*:*:*:-:*:*:*
cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:*
cpe:2.3:a:adobe:experience_manager:6.5:-:*:*:lts:*:*:*
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