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Adobe Experience Manager CVE-2025-64600

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 by application
  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 (1) a low-privileged authenticated account in Adobe Experience Manager with the ability to write to one of the affected form fields (PR:L - this is NOT remote-unauthenticated), and (2) a victim subsequently browsing to the page that renders the injected field (UI:R). The stored nature means the payload persists server-side and fires on normal page viewing. Limiting factors: an attacker must already possess authoring/contribution privileges, and impact is confined to the victim's browser session (C:L/I:L, no availability impact). Affected deployments are AEM 6.5.23 and earlier, AEM 6.5 LTS, and AEM as a Cloud Service per the supplied CPEs.

Impact

This is a moderate-severity stored XSS (CVSS 5.4) that should be treated as a routine, scheduled-patch priority rather than an emergency. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) signals network reach and low complexity but two meaningful constraints: an attacker must already hold low-level authenticated access (PR:L) and a victim must interact by browsing to the affected page (UI:R). The scope change (S:C) and C:L/I:L reflect classic stored-XSS impact - script execution in a victim's browser context rather than direct server compromise, with no availability impact (A:N). Corroborating signals all point low: EPSS is 0.20% (10th percentile), the vulnerability is NOT listed in CISA KEV, and no public POC is referenced in the provided data. No SSVC decision data was supplied. Signals are internally consistent - there is no CVSS-vs-description conflict here - so the honest read is a legitimate-but-low real-world risk: a privileged-insider or compromised-low-tier-account vector against an enterprise CMS, not a mass-exploitation threat.

Exploit ScenarioDerived

A low-privileged authenticated AEM author or form contributor injects malicious JavaScript into a vulnerable form field, which is stored by the application. When a victim (e.g., another author or an end user) later browses to the page rendering that field, the script executes in their browser, enabling session/cookie theft or actions in their authenticated context. No public exploit code is referenced, and exploitation requires both prior 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 – Oct 14, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier, AEM 6.5 LTS, and AEM as a Cloud Service lets a low-privileged authenticated user persist malicious JavaScript into vulnerable form fields, which then executes in the browser of anyone who views the affected page. Exploitation requires an attacker to already hold an authoring or contribution account with write access to the field (PR:L - this is not remote-unauthenticated) and a victim who subsequently browses to the rendered page (UI:R), which is why the issue is scored a moderate 5.4 with impact limited to the victim's browser session (C:L/I:L, no availability impact). EPSS is just 0.20% (10th percentile), there is no CISA KEV entry, and no public exploit identified at time of analysis; this should be handled as a routine, scheduled-patch priority rather than an emergency, with the practical risk being session/token theft or action-on-behalf if a higher-privileged user views the poisoned page.

RemediationAI

Patch available per vendor advisory - Adobe's security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html) lists the fixed Experience Manager builds, and no exact fix version is included in the available data, so the bulletin itself must be consulted rather than assuming a version number; apply the listed update to AEM 6.5, AEM 6.5 LTS, and AEM as a Cloud Service deployments, prioritising internet-facing publish instances and any instance where untrusted or broad contributor groups can author content. Where immediate patching is not possible, compensating controls with real trade-offs include restricting author and contributor group membership to a tightly vetted set of accounts (the weakness requires PR:L write access, so removing that access eliminates the primary path - but it slows legitimate content operations), sanitizing and escaping stored field output on the publish tier via custom Sling/HTL encoder configuration or Dispatcher-level output-filtering rules (effective but requires testing to avoid breaking legitimate rich content), and enforcing a strict Content-Security-Policy on AEM publish responses to block inline script execution (mitigates weaponisation of an already-injected payload but will break any first-party inline scripts that have not been nonced or hashed). After upgrading, audit existing stored form-field content for any persisted payloads that may have been injected before the fix was applied, and rotate sessions or tokens for any user known to have viewed a suspect page, since the impact of the XSS is confined to the victim's browser session (C:L/I:L, no availability impact).

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, i.e. cross-site scripting) in the stored/persistent variant: user-controlled content written to an AEM form field is later rendered by the application without adequate output encoding or sanitization, so the payload is served from the trusted AEM origin rather than reflected off a crafted link. Adobe Experience Manager is a Java-based enterprise content management and digital experience platform with a distinct author tier (where contributors create and edit content) and a publish tier (where that content is served to end users), and the vulnerability sits in the handoff between the two. The CVSS:3.1 vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N supplied by Adobe and independently assessed here confirms network reachability, low attack complexity, a low-privileged authenticated attacker, required victim interaction, and a scope change (S:C) reflecting that the injected script executes in the context of the victim's browser session rather than the attacker's own privileges. Affected per the supplied CPE data are the mainline AEM track (cpe:2.3:a:adobe:experience_manager:*:*:*:*:-:*:*:*), the cloud-hosted track (cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:*), and the long-term-support line (cpe:2.3:a:adobe:experience_manager:6.5:-:*:*:*:lts:*:*:*), which means both self-hosted and managed deployments need to be inventoried.

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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 reachable over the network by a low-privileged author (PR:L) that fires only when a victim views the page (UI:R); script runs cross-context (S:C) with limited 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 90% exploitable
Prevalence
High
Adobe Experience Manager is a widely deployed enterprise CMS platform
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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