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Adobe Experience Manager CVE-2025-64845

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 author account
  2. Delivery
    Inject script into vulnerable form field
  3. Exploit
    Payload stored in AEM repository
  4. Execution
    Victim browses to affected page
  5. Impact
    Malicious JavaScript 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 account on Adobe Experience Manager (PR:L) with the ability to submit content into a vulnerable form field, plus victim user interaction (UI:R) - a second user must navigate to the page rendering the injected field for the stored script to execute. This applies to AEM versions 6.5.23 and earlier, including AEM Cloud Service and AEM 6.5 LTS deployments. Limiting factors: it is not exploitable by anonymous/unauthenticated attackers, it does not fire without a victim visiting the affected page, and impact is confined to low confidentiality and integrity effects in the victim's browser (no server-side compromise or availability impact).

Impact

This is a genuinely low-priority issue despite the enterprise footprint of the affected product. All signals align at the low end: 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 the attack is double-gated - it requires both low-level authentication (PR:L) AND victim interaction (UI:R, the victim must browse to the affected page). Impact is limited to C:L/I:L with no availability impact. EPSS reinforces this: 0.20% probability at only the 9th percentile, indicating exploitation is highly unlikely relative to other CVEs. There is no CISA KEV listing and no public POC. The scope change (S:C) - script executing in the victim's browser context outside the vulnerable component - is the only factor elevating this above a 4.x score. No signals conflict; the low CVSS, low EPSS, absence of KEV, and absence of POC all point the same direction. This is a legitimate defect worth patching in routine maintenance cycles, not an emergency.

Exploit ScenarioDerived

A low-privileged AEM author account injects a malicious JavaScript payload into a vulnerable form field. When another user (e.g., an admin or reviewer) later browses to the page rendering that field, the stored script executes in their browser session, potentially stealing session tokens or performing actions in their context. No public exploit code has been identified at time of analysis, and exploitation requires both authenticated access and victim interaction.

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 – Sep 26, 2026

Stored cross-site scripting (XSS) in Adobe Experience Manager 6.5.23 and earlier allows an authenticated low-privileged attacker to inject malicious scripts into vulnerable form fields, which execute in a victim's browser when the victim views the affected page. This affects AEM 6.5.23 and earlier, including AEM Cloud Service and AEM 6.5 LTS. The vulnerability is low priority (EPSS 0.20%, 9th percentile) because exploitation requires an authenticated account and victim interaction; no public exploit identified at time of analysis.

RemediationAI

Patch available per vendor advisory: apply the fix from Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html), which addresses AEM 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS. Since the vulnerability requires an authenticated low-privileged account and victim interaction, compensating controls include restricting form-authoring permissions to trusted users, enforcing least privilege, reviewing existing form content for injected scripts, and implementing input validation/output encoding. Limiting form submission privileges may impact legitimate low-privileged authors, so coordinate with business owners; Content Security Policy can help mitigate script execution but is not a substitute for patching.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

Adobe Experience Manager (AEM) is an enterprise content management system. The flaw is a stored (persistent) cross-site scripting issue classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). An attacker with a low-privileged AEM account (PR:L) can submit crafted input into a vulnerable form field; the payload is stored and later rendered without sufficient sanitization, causing script execution in the browser of any user who views the page (UI:R). The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N indicates network attack, low complexity, scope change, and low confidentiality/integrity impacts with no availability impact. CPE data confirms coverage of generic Adobe Experience Manager, AEM Cloud Service, and AEM 6.5 LTS. There is no server-side compromise and no impact beyond the victim's browser session.

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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

Network-reachable web CMS (AV:N) requiring an authenticated author (PR:L) and a victim page view (UI:R); stored XSS crosses into the browser context (S:C) with limited C/I 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:L/VI:L/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 91% exploitable
Prevalence
Medium
widely-used enterprise CMS but not ubiquitous consumer-scale software
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
Medium

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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