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Adobe Experience Manager CVE-2025-64554

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 author
  2. Delivery
    Inject JavaScript into vulnerable form field
  3. Exploit
    Payload stored server-side
  4. Execution
    Victim browses to affected page
  5. Impact
    Script executes in victim browser session

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 a low-privileged but authenticated AEM account with the ability to write to the vulnerable form fields (PR:L - e.g., an author/content-contributor role), and it requires victim user interaction (UI:R): a second user must subsequently browse to the page rendering the stored payload. It affects AEM 6.5.23 and earlier, including AEM Cloud Service and AEM 6.5 LTS. This is not a default-config unauthenticated flaw - the need for a valid authoring account plus a victim page visit substantially limits realistic impact to insider or compromised-author scenarios, with impact confined to client-side script execution (no server-side code execution or availability impact).

Impact

This is a genuine but low-priority issue despite the network attack vector. Signals align consistently toward low real-world urgency: EPSS is 0.25% (15th percentile), there is no CISA KEV listing (not actively exploited), and no public POC has been identified. The CVSS 5.4 (Medium) is honest and self-limiting - although AV:N and AC:L, exploitation is double-gated by PR:L (attacker must already hold a low-privileged authenticated AEM account, typically an author/content contributor) and UI:R (a victim must browse to the page hosting the injected script). The scope change (S:C) and reflected impacts are only C:L/I:L with A:N, consistent with client-side script execution in a victim browser rather than server compromise. This is a high-CVSS-but-low-real-risk profile relative to the unauthenticated 9.3 DOM-XSS members of the same Adobe batch; it is a defense-in-depth patch, not an emergency. No conflicting signals across sources - all point to Medium/Low.

Exploit ScenarioDerived

A low-privileged authenticated AEM author injects a malicious JavaScript payload into a vulnerable form field. The payload is stored server-side; when a victim (e.g., another author or an administrator) later browses to the page containing that field, the script executes in their browser session in the AEM origin, enabling session/cookie theft or actions on their behalf. 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 25, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier allows an authenticated low-privileged author to inject malicious JavaScript into vulnerable form fields, which then executes in a victim's browser when they visit the affected page. This issue also affects AEM Cloud Service and AEM 6.5 LTS, but exploitation requires a valid authoring account and victim user interaction, limiting realistic impact to insider or compromised-author scenarios. EPSS is very low (0.25%, 15th percentile), and no public exploit has been identified at time of analysis.

RemediationAI

Vendor-released patch per Adobe advisory APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html); apply the update as directed by Adobe for your specific release track. As a compensating control, restrict authoring permissions to only trusted users and enforce a strong Content Security Policy (CSP) to mitigate script execution, though CSP may break legitimate functionality if not carefully tuned. Additionally, validate and sanitize all user-supplied input on form fields, and consider disabling or limiting the ability to embed raw HTML in form fields for low-privileged authors, recognizing that this may reduce flexibility for content authors.

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 vulnerability is a stored (persistent) cross-site scripting (XSS) flaw, classified as CWE-79, in Adobe Experience Manager's handling of form fields. An attacker with a low-privileged authenticated account (PR:L) can inject malicious script into a form field, which is stored on the server and later rendered without proper output encoding. When a victim user browses to the page containing the vulnerable field, the script executes in the context of their browser session, potentially leading to session hijacking, defacement, or theft of sensitive data. The CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates network accessibility, low attack complexity, required privileges, and user interaction, with scope change and low confidentiality and integrity impact. Affected products include Adobe Experience Manager 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS, as indicated by CPE strings.

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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 needs an authenticated author account (PR:L) and a victim page visit (UI:R); browser-context script gives C:L/I:L, scope change to the browser origin (S:C), 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 deployed in specific large-org environments, not everywhere
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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