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Adobe Experience Manager CVE-2025-64801

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 in repository
  4. Execution
    Victim browses affected page
  5. Persist
    Script executes in victim browser
  6. Impact
    Session/context theft in victim's 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 (1) an authenticated account with at least low privileges sufficient to submit/edit content into an affected AEM form field, and (2) required victim interaction - a separate user must navigate to the page rendering the stored payload for the script to fire. It affects AEM 6.5.23 and earlier, including AEM Cloud Service and AEM 6.5 LTS. These two gates (authentication + victim browse) meaningfully limit real-world risk; there is no unauthenticated or zero-click path, and impact is confined to the victim's browser (scope-changed C:L/I:L), not server-side code execution.

Impact

This is a genuine but LOW-priority issue despite its MEDIUM 5.4 CVSS. The vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N is doubly gated: it requires an authenticated low-privileged attacker (PR:L) AND victim interaction (UI:R) - a victim must browse to the page hosting the poisoned form field. Impact is limited to C:L/I:L with no availability effect, consistent with a stored XSS running in the victim's browser rather than server compromise. EPSS reinforces the low real-world urgency at 0.25% (15th percentile), and there is no CISA KEV listing and no public exploit code identified. No SSVC decision data was supplied. All signals are mutually consistent - there is no conflict between CVSS, EPSS, and KEV: modest severity, low exploitation probability, no known exploitation. The one caveat is that Adobe's advisory (APSB25-115) is bundled and does not enumerate a specific fixed build here, so the exact patched version is not independently verifiable from the provided data.

Exploit ScenarioDerived

A low-privileged AEM author or form-capable user injects a malicious JavaScript payload into a vulnerable form field, which AEM stores and later renders unescaped. When a higher-privileged user or another visitor browses to the page containing that field, the script executes in their browser session, enabling session/cookie theft or actions in their AEM context. No public proof-of-concept exploit 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 allows a low-privileged authenticated attacker to inject malicious JavaScript into form fields, which executes in a victim's browser when they view the affected page. Exploitation requires both an authenticated account with content-editing privileges and victim interaction, limiting the attack to browser-based impacts such as session theft or page defacement rather than server compromise. No public exploit code is identified at time of analysis, and the EPSS score is 0.25% (15th percentile), indicating a low likelihood of exploitation; CISA KEV does not list this CVE.

RemediationAI

Apply the latest security update listed in Adobe Security Bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html) to upgrade beyond AEM 6.5.23; patch availability is confirmed via the vendor advisory but the exact fixed version is not stated in the provided data. If immediate patching is not possible, restrict the ability to edit or submit content to trusted users only, as the vulnerability requires a low-privileged authenticated account; this reduces the attack surface but may impact legitimate content workflows. Additionally, deploy a Content Security Policy (CSP) that blocks inline script execution and consider input sanitization or output encoding on form fields, though these are compensating controls and may not fully eliminate the risk. Monitor for unusual script injection attempts in form submissions.

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

This is a stored cross-site scripting (XSS) vulnerability (CWE-79) in Adobe Experience Manager, a content management system used for building websites, forms, and digital experiences. The flaw exists in the handling of form fields where user-supplied input is persisted without adequate output encoding. An authenticated attacker with low privileges can submit crafted input that is stored on the server; when another user later browses to the page containing that field, the script executes in the victim's browser context. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) confirms network attack, low privileges required, user interaction needed, and a scope change limited to low confidentiality and integrity impacts on the client side. Affected CPE entries indicate Adobe Experience Manager (all versions up to 6.5.23), the AEM Cloud Service, and the 6.5 LTS release. No server-side code execution or privilege escalation is possible; the impact is confined to the victim's browser.

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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 stored XSS needing a low-priv account (PR:L) and victim page view (UI:R); browser-context execution crosses trust boundary (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:L/VI:L/VA:N/SC:N/SI:N/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 Java CMS but not on every network
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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