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Adobe Experience Manager CVE-2025-64861

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-priv AEM author
  2. Delivery
    Inject script into vulnerable form field
  3. Exploit
    Payload stored server-side
  4. Execution
    Victim browses affected page
  5. Persist
    Script executes in victim browser
  6. Impact
    Hijack session / act as victim

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

Requires an authenticated account with at least low-privilege access to a vulnerable AEM form-editing/authoring feature (PR:L) - not exploitable by anonymous users. The attacker injects script into a specific vulnerable form field which is persisted; exploitation only completes when a separate victim user navigates to the page rendering that field (UI:R), so it cannot fire without victim interaction. Applies to AEM 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS. Impact is confined to the victim's browser context within the AEM application (client-side script execution, C:L/I:L); there is no server-side code execution or availability impact.

Impact

This is a genuinely LOW-priority issue despite being a network-vector XSS. All signals align on low real-world risk: the CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, base 5.4 MEDIUM) is doubly gated - it requires an already-authenticated low-privileged account (PR:L) AND victim user interaction (UI:R, the victim must browse to the page holding the injected field). EPSS is very low at 0.20% (9th percentile), indicating the ecosystem does not expect exploitation. There is no CISA KEV listing and no public POC identified at time of analysis, so exploitation status is 'no public exploit identified at time of analysis'. No SSVC decision data was supplied. Impact is limited to C:L/I:L with A:N - a stored XSS running in the victim's browser session, not server compromise. There are no conflicting signals: the vector, EPSS, and absence of exploitation evidence all point the same way. The only mild elevation comes from AEM being an enterprise CMS often handling privileged marketing/author sessions, so the scope-change (S:C) and cross-user script execution have some value to an insider or a compromised low-priv author account. Overall: a high-CVSS-optics but low-real-risk authenticated, click-gated XSS - patch on normal cycle, not an emergency.

Exploit ScenarioDerived

A low-privileged authenticated user (e.g. a limited AEM author or form editor) injects malicious JavaScript into a vulnerable form field that is persisted server-side. When a higher-privileged author or another user later browses to the page containing that field, the stored script executes in their browser, potentially stealing their AEM session token or performing actions as them within the CMS. No public exploit code is currently available, and both authentication and victim interaction are required.

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, AEM 6.5 LTS, and AEM Cloud Service allows an authenticated low-privilege author to persist malicious JavaScript into a vulnerable form field, which then executes in the browser of any user who visits the page rendering that field. Per the assessed vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, base 5.4), exploitation requires a valid author-level account and a separate victim who interacts with the poisoned page, so it is not reachable by anonymous users and cannot fire without victim interaction; impact is confined to the victim's browser session within the AEM application, with no server-side code execution or availability impact. No public exploit identified at time of analysis, and EPSS is 0.20% (9th percentile), consistent with a genuinely low-priority issue despite the network attack vector; patch available per vendor advisory (Adobe APSB25-115).

RemediationAI

Patch available per vendor advisory: apply the fix identified in Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html) for AEM 6.5.23 and earlier, AEM 6.5 LTS, and the AEM Cloud Service; the provided data does not state an exact fixed version number, so confirm the target build against Adobe's bulletin before upgrading. Because the flaw requires an authenticated low-privilege author account, the most effective compensating control is to tighten author-side authorization: restrict access to form authoring/editing features and the related AEM Forms components to a small, trusted set of users and remove author privileges from accounts that do not need them - the trade-off is reduced content-team flexibility and possible workflow friction for legitimate authors. Additional mitigations include enforcing a strict Content Security Policy on AEM author and publish tiers to block inline script execution (trade-off: may break legitimate inline scripts and analytics components unless carefully tuned with nonces/hashes), and deploying WAF or reverse-proxy filtering that rejects script-bearing payloads in form submission parameters (trade-off: signature-based rules are bypassable with encoding tricks and can generate false positives on legitimate rich-text content). Ensuring authors are not logged into the same browser session for untrusted browsing, and reminding users not to open untrusted AEM page links while authenticated, reduces the likelihood that a stored payload is triggered, though these are hygiene measures rather than fixes. Note that no public exploit code was identified at time of analysis, so immediate emergency change-control escalation is not warranted; treat this as a routine patch-cycle item per the vendor advisory.

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

This is a classic persistent (stored) cross-site scripting flaw, CWE-79, in Adobe Experience Manager's form authoring and rendering pipeline. In AEM, forms and adaptive form fields are authored by content authors and stored as content nodes in the JCR (Java Content Repository); the stored field content is later rendered server-side into HTML served to other AEM users. Because the application fails to properly encode or sanitize attacker-supplied input when it is written and/or re-rendered, script payloads persist in the repository and execute in the origin of the AEM application for every subsequent viewer of that page. The CPE data confirms three affected tracks: the general adobe:experience_manager CPE covering 6.5.23 and earlier, the aem_cloud_service edition, and the 6.5 lts release channel - meaning both on-premise/managed-services 6.5.x deployments and the hosted Cloud Service are in scope. The CVSS scope change (S:C) reflects that the injected script runs in the victim's browser security context, a boundary separate from the vulnerable AEM component, while the PR:L/UI:R components confirm the two-sided precondition of an authenticated low-privilege author plus a victim who navigates to the affected page.

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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-priv author injects stored script (PR:L), requires victim to view the page (UI:R), executes cross-context in browser (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 91% exploitable
Prevalence
Medium
Enterprise Java/Sling CMS, common in large orgs but not ubiquitous
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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