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Adobe Experience Manager CVE-2025-64604

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 script into form field
  3. Exploit
    Payload stored persistently
  4. Execution
    Victim browses affected page
  5. Impact
    Script executes in victim browser

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 an authenticated low-privileged AEM account (PR:L) with the ability to submit or edit content in a vulnerable form field, and it further requires a victim to subsequently browse to the page rendering that field (UI:R) - both conditions must be met, which substantially limits opportunistic or unauthenticated attacks. The affected feature is script-injectable form fields in Adobe Experience Manager 6.5.23 and earlier (including 6.5 LTS and AEM Cloud Service). The flaw is not reachable by anonymous/unauthenticated users and cannot self-propagate without victim page visits, so impact is highest in multi-author or externally-accessible authoring environments where low-privileged accounts are broadly provisioned.

Impact

This is a moderate-severity stored XSS (CVSS 5.4, CWE-79) that the combined signals rate as a low operational priority rather than an urgent threat. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) shows network reachability and low complexity but requires an authenticated low-privileged account (PR:L) AND victim interaction (UI:R), both of which constrain real-world exploitation; the scope change (S:C) and C:L/I:L reflect that injected script executes in another user's browser context rather than compromising the server. EPSS reinforces low urgency at 0.25% (15th percentile), and the vulnerability is NOT listed in CISA KEV, with no public exploit code identified - so exploitation status is 'no public exploit identified at time of analysis.' No SSVC decision data was supplied in the input, so automatable/technical-impact cannot be independently cited. Signals are consistent (moderate CVSS, low EPSS, no KEV/POC), pointing to a genuine but non-critical issue best handled in normal patch cycles; the main caveat is that stored XSS in a widely deployed CMS can enable session/credential theft or admin-targeted phishing if a low-privileged author account is obtained.

Exploit ScenarioDerived

A low-privileged authenticated user (e.g., a content author) injects malicious JavaScript into a vulnerable AEM form field, which is stored persistently. When a victim - potentially a higher-privileged administrator or another visitor - browses to the page rendering that field, the script executes in their browser, enabling session hijacking or actions on their behalf. No public exploit code was identified, and exploitation depends on both the attacker's authenticated access and the victim visiting the affected page.

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 the 6.5 LTS line and AEM Cloud Service - lets an authenticated, low-privileged user inject malicious JavaScript into vulnerable form fields, which then executes in the browser of any victim who browses to the page rendering that field. Exploitation requires two conditions to be met simultaneously: a valid low-privileged AEM account with permission to submit or edit content (PR:L), and a victim subsequently visiting the affected page (UI:R), so the flaw is not reachable anonymously and does not self-propagate. The issue is rated CVSS 5.4 (S:C, C:L/I:L/A:N), EPSS is 0.25% (15th percentile), and there is no CISA KEV entry or public exploit code identified at time of analysis, making this a low operational priority rather than an urgent threat.

RemediationAI

No specific fixed version number is provided in the available input data, so remediation must be driven by Adobe's security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html), which is the authoritative source for the patched AEM 6.5 service pack level; verify the exact release before upgrading and do not rely on inferred version numbers. AEM Cloud Service customers are generally patched automatically by Adobe, but on-premise and Managed Services 6.5.23-and-earlier deployments should upgrade to the bulletin's fixed release as the primary fix. Where immediate upgrade is not possible, keep the following compensating controls with their trade-offs in mind: restrict the population of low-privileged authoring accounts and audit their content-edit permissions, since the attack requires PR:L and each unnecessary contributor account expands exposure; enforce network-level access control so author instances are not reachable from untrusted networks and publish instances are fronted by the AEM Dispatcher with strict request filtering, accepting that this may disrupt legitimate publishing workflows; deploy a Web Application Firewall with stored-XSS payload signatures and a restrictive Content Security Policy on rendered pages, noting that aggressive CSP directives commonly break legitimate inline scripts and third-party embeds in AEM components; and perform a content audit across the JCR to locate and remove any already-stored payloads in form fields, since patching the code alone does not neutralize scripts that have already been persisted. Note that no public exploit code or confirmed active exploitation was identified at time of analysis, so these measures should be prioritized according to the moderate severity (CVSS 5.4) rather than treated as an emergency.

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 Input During Web Page Generation), specifically the stored/persistent variant: attacker-supplied script is persisted in AEM's Java Content Repository (JCR, backed by Apache Sling and Jackrabbit Oak) through form-field submission, then rendered without adequate output encoding to every subsequent visitor of that page. Adobe Experience Manager is a Java-based enterprise CMS and digital experience platform, and the affected component class is script-injectable form fields - the kind exposed through AEM Forms/Adaptive Forms and content authoring surfaces. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N is notable for its Scope:Changed (S:C) metric, meaning execution can escape the vulnerable component's security context into the victim's browser session (session riding, credential/token theft, or forged actions as the victim), though Confidentiality and Integrity impacts are rated Low and Availability is None. The CPE data confirms broad coverage: the generic adobe:experience_manager product family, the aem_cloud_service edition, and the 6.5 LTS release train, indicating the flaw is not confined to a single deployment form factor. Because the payload is stored, an injected script remains a latent risk for anyone who later views the page until the content is cleaned up - which is why authoring environments with many low-privileged contributors carry the highest residual exposure.

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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 author injects the payload (PR:L); a victim must load the page (UI:R); stored script runs in the victim's browser context (S:C) with limited confidentiality/integrity impact and no availability loss.

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 across large organizations and AEM 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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