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Adobe Experience Manager CVE-2025-64596

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
    Obtain low-privileged AEM account
  2. Delivery
    Inject malicious script into form field
  3. Exploit
    Payload stored on page
  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 a low-privileged but authenticated AEM account (PR:L) with the ability to write content into form fields - consistent with an author, form editor, or content-contributor role rather than an anonymous user. The stored payload only executes when a victim (another user or administrator) subsequently browses to the page containing the injected field, so required victim user interaction (UI:R) is the key limiting factor. Affected deployments are Adobe Experience Manager 6.5.23 and earlier, including the 6.5 LTS and AEM Cloud Service CPE configurations. There is no remote unauthenticated exploitation path and no automatable mass-exploitation vector; impact is confined to the victim's browser session (low confidentiality/integrity, no availability impact).

Impact

This is a moderate-severity stored XSS (CVSS 5.4, CWE-79) that the signals consistently rank as a lower operational priority despite affecting a widely-deployed enterprise product. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) shows network reach and low attack complexity, but requires an authenticated low-privileged account (PR:L) AND victim interaction (UI:R), with only low confidentiality and integrity impact and no availability impact. These limiting factors align with the EPSS score of 0.25% (15th percentile), indicating low predicted exploitation probability. The CVE is NOT in CISA KEV and no public exploit code is referenced, so there is no evidence of active or automatable exploitation. No SSVC decision data was provided. In short, this is a genuine flaw in a high-footprint product but a high-CVSS-but-moderate-real-risk issue: the combination of required authentication, required user interaction, and limited impact scope argues for routine patching priority rather than emergency response. No signals conflict - all point to the same lower-urgency conclusion.

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 script is stored and later executes in the browser of any victim - such as another author or administrator - who navigates to the page containing the field, potentially enabling session token theft or actions in the victim's authenticated context. No public proof-of-concept exploit is referenced.

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 allows a low-privileged but authenticated user - an author, form editor, or content contributor able to write into form fields - to persist malicious JavaScript that executes in the browser of any victim who later views the affected page (CVSS 3.1 5.4, CWE-79, scope-changed with low confidentiality and integrity impact, no availability impact). Because delivery depends on a second party browsing the poisoned page, the vector carries UI:R and there is no unauthenticated remote or automatable mass-exploitation path; impact is confined to the victim's browser session. At the time of analysis there was no public exploit identified, no CISA KEV listing, and EPSS was low at 0.25% (15th percentile), which places this in the routine enterprise-patching queue rather than an emergency-response tier.

RemediationAI

Adobe's security advisory at https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html is the authoritative remediation reference; the provided data does not confirm an exact fixed version, so confirm the applicable 6.5 service pack or cumulative hotfix level against that advisory (rather than an untagged commit or inferred release) before declaring any instance remediated, and note that AEM Cloud Service customers are typically patched by Adobe on the managed channel and should verify their tenant's version. Until the fix is confirmed applied, the highest-value compensating control is least-privilege authoring: audit and reduce the number of accounts holding author, form-editor, or content-contributor permissions capable of writing into form fields, and where possible restrict form authoring to a small trusted group - the trade-off is slower content velocity for legitimate editors. Server-side hardening is the second layer: enable AEM's built-in output escaping and the rich-text editor's allow-list configuration for the affected form components, and validate or reject script-bearing markup on submission, recognizing that any custom component bypassing the standard rendering APIs will not inherit this protection. A reverse proxy or WAF rule that blocks script-bearing payloads on form submission endpoints raises the bar but is bypassable and should be considered a stopping-gap, not a fix, and deploying a Content-Security-Policy that disallows inline script on authoring and publish tiers meaningfully reduces execution even if a payload is stored - with the caveat that strict CSP frequently breaks legitimate AEM client-side componentry and requires staged rollout. Finally, because exploitation requires a victim to load the poisoned page, raising awareness among administrators to avoid browsing untrusted content pages and monitoring for anomalous script content in stored form data provides detection value while remediation is pending.

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 root cause is CWE-79, improper neutralization of user-controllable input during web page generation, expressed here as the persistent (stored) variant: attacker-supplied script content is written into an AEM form field and stored server-side, then rendered to other users without adequate output encoding or context-aware escaping. AEM deployments typically separate an author instance (where low-privileged authors and form editors create content) from publish instances that serve that content to anonymous or authenticated visitors, and the CPE data confirms the affected footprint spans the general 6.5 line, the 6.5 LTS channel, and the AEM Cloud Service flavor. The stored nature means payloads survive across sessions and are served by trusted infrastructure, so classic reflected-XSS filtering heuristics and simple request-inspection rules are less effective; the practical choke points are the authoring permissions that let the payload be written in the first place, the form/rich-text components that store it, and the HTML rendering paths that emit it. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates a network-reachable, low-complexity attack that requires low privileges and victim interaction, with the scope change reflecting script execution moving from the vulnerable AEM application context into the victim's browser origin, which is what makes session or credential theft from an administrative viewer the meaningful escalation concern.

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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

Authenticated low-privileged user injects the payload (PR:L), a victim must browse the page (UI:R), and execution in the victim's browser crosses the security scope (S:C) with limited C/I impact 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 (AEM) including on-premise, LTS, and cloud service
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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