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Adobe Experience Manager CVE-2025-64555

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 persistently
  4. Execution
    Victim browses 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 an Adobe Experience Manager instance (versions 6.5.23 and earlier, including AEM Cloud Service and 6.5 LTS) with the ability to submit content into the vulnerable form fields. The stored payload only triggers when a victim subsequently navigates to the page rendering that field (required user interaction, UI:R). Limiting factors: valid authentication is mandatory (PR:L, not unauthenticated), victim browsing is required to fire the script, and impact is confined to limited confidentiality/integrity in the victim's browser (C:L/I:L) with no server compromise or availability impact.

Impact

This is a genuine but low-priority vulnerability. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, base 5.4) describes a stored XSS that is doubly gated: the attacker must already hold low-privileged authenticated access (PR:L) to an AEM author instance to inject the payload, and a victim must then browse to the affected page (UI:R) for the script to fire. The scope change (S:C) reflects that injected script executes in the victim's browser origin rather than the CMS backend, but impacts are limited to C:L/I:L with no availability effect - this is not server-side code execution. EPSS reinforces the low-urgency read at 0.25% (15th percentile), and there is no CISA KEV listing and no public exploit code identified. No SSVC decision data was provided in the input. Signals are internally consistent - moderate CVSS, low EPSS, no exploitation evidence - so this is a high-CVSS-context-but-modest-real-risk item best handled through normal patch cadence rather than emergency response. No data conflicts were observed; the CVSS vector aligns with the description (authenticated injection, victim interaction).

Exploit ScenarioDerived

A low-privileged authenticated AEM user (e.g., a content contributor or form author) injects malicious JavaScript into a vulnerable form field that is persistently stored. When another user - such as an administrator or site visitor - later browses to the page rendering that field, the script executes in their browser session, enabling session-token theft or actions in their authenticated context. No public exploit code has been identified at time of analysis.

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 in Adobe Experience Manager 6.5.23 and earlier lets an authenticated low-privileged user plant malicious JavaScript in vulnerable form fields, which then executes in the browser of any user who later browses to the page rendering that field. Because exploitation requires a valid account (CVSS PR:L) and victim interaction (UI:R), and the impact is confined to the victim's browser rather than the server, this is a genuine but low-priority vulnerability; no public exploit code has been identified at time of analysis and EPSS is 0.25% (15th percentile), with no evidence of active exploitation. The same weakness is reported against AEM Cloud Service and 6.5 LTS in the vendor CPE data, and Adobe documents the fix in advisory APSB25-115.

RemediationAI

Apply the vendor fix documented in Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html); since AEM 6.5.23 and earlier are the affected range, install the service pack or hotfix release the bulletin identifies as containing the correction, and confirm the same update path for AEM Cloud Service and 6.5 LTS deployments. Patch status is characterized as patch available per vendor advisory, and no independent confirmation of a patched build number was provided in the source data, so verify the exact fixed version against the advisory before closing the issue. Where immediate upgrade is not possible, high-value compensating controls include restricting content authoring and form-submission privileges to trusted accounts (note this defeats exploitation only if untrusted low-privileged authors can be eliminated, and it may disrupt legitimate contributor workflows), enabling a strict Content Security Policy on AEM publish and author tiers to block inline script execution (trade-off: CSP can break legitimate inline scripts and third-party integrations and requires testing), and validating/sanitizing custom form field components so that stored values are HTML-encoded on output, which requires code review of custom components but does not fix the vulnerable out-of-the-box paths. Administrators should also review dispatcher and CDN rules for any cached pages containing unsanitized field content and monitor for injected script payloads in submitted form data.

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

The flaw is a persistent (type-2) cross-site scripting issue classified as CWE-79, arising where Adobe Experience Manager fails to neutralize user-supplied input before it is stored and later re-rendered in the HTML of a form field. AEM is an enterprise content management and digital asset platform whose forms and page components frequently echo author-supplied content back to other users, so a low-privileged author able to submit content into a vulnerable field can persist a script payload server-side that fires in the context of any victim viewing that page. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N reflects network reachability with low attack complexity, mandatory low-privileged authentication, required victim browsing, and a scope change (S:C) because the script executes in the victim's browser rather than remaining within the AEM component's own security authority; confidentiality and integrity impacts are limited (C:L/I:L) and there is no availability impact, consistent with browser-session abuse rather than server compromise. The affected CPE entries cover the AEM 6.5 branch generally as well as the aem_cloud_service edition and the 6.5 LTS channel, indicating the vulnerable rendering path is shared across on-premise and cloud-hosted deployments, and reinforcing that AEM's built-in XSS protection framework and output-encoding filters must be correctly applied to custom form components.

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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 requires a low-privileged authenticated injector (PR:L) and victim page view (UI:R); script runs in browser origin (S:C) with limited C:L/I:L 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: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 85% exploitable
Prevalence
Medium
widely-used enterprise CMS but a specific vendor product, not ubiquitous infrastructure
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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