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Adobe Experience Manager CVE-2025-64582

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 vulnerable form field
  3. Exploit
    Payload stored in application
  4. Execution
    Victim browses affected page
  5. Persist
    Script executes in victim browser
  6. Impact
    Session hijack or data theft

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 (PR:L) with the ability to write into the affected AEM form fields, and it is limited by required victim interaction (UI:R) - a separate user must browse to the page rendering the injected field before the stored script fires. It applies to Adobe Experience Manager 6.5.23 and earlier (including the 6.5 LTS and AEM Cloud Service CPEs listed); there is no indication a non-default configuration is needed, but the dependency on both attacker authentication and victim browsing meaningfully constrains real-world exploitation compared to an unauthenticated flaw.

Impact

This is a genuinely moderate, not high, priority. The CVSS 3.1 base score of 5.4 (vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) describes a network-reachable but user-interaction-dependent stored XSS that requires low-level authenticated privileges to plant the payload, with only Low confidentiality and integrity impact and no availability impact. The scope change (S:C) reflects that injected script executes in a victim's browser context rather than the AEM server itself, which is why impacts stay Low rather than High. Corroborating signals point to low real-world urgency: EPSS is 0.20% at the 9th percentile, indicating very low near-term exploitation probability, and there is no CISA KEV listing and no public exploit identified at time of analysis - so there is no evidence of active exploitation or weaponization. No SSVC decision data was provided in the input. The signals are mutually consistent (modest CVSS + low EPSS + no KEV/POC), so there is no conflict to flag; the main caveat is that stored XSS in an enterprise CMS can be leveraged against privileged admin/author users, which could amplify impact beyond the Low ratings if an administrator is the victim.

Exploit ScenarioDerived

A low-privileged AEM author-tier user injects a malicious JavaScript payload into a vulnerable form field, which is stored by the application. When a higher-privileged user or site visitor later browses to the page rendering that field, the script executes in their browser, enabling session/cookie theft or actions performed as the victim. No public exploit code was identified at time of analysis, so exploitation would require an attacker to craft the payload independently.

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 08, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier lets an authenticated but low-privileged user persist malicious JavaScript inside AEM form fields, which then executes in the browser of a separate victim who browses to the page rendering that field. Rated CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N), the issue requires both an attacker account with write access to the affected fields and victim interaction, which meaningfully constrains real-world impact; EPSS is minimal at 0.20% (9th percentile) and no public exploit has been identified at time of analysis (not in CISA KEV). This is a genuinely moderate, not high, priority.

RemediationAI

Adobe addresses this issue under security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html); administrators should apply the vendor update for their AEM track (on-premise 6.5, 6.5 LTS, or Cloud Service) and confirm the exact fixed build against that bulletin, since the available input data does not enumerate a specific patched version. Until the update is deployed, the most effective compensating control is to tightly restrict which accounts hold author/write permissions on AEM form components and content pages, because the flaw requires an authenticated low-privileged attacker able to submit into those fields (PR:L) - narrowing that population shrinks the attack surface but can slow legitimate content workflows. Additional hardening includes deploying a Content Security Policy that blocks inline and untrusted script execution on rendered pages (effective against payload delivery, though it can break legitimate AEM client-side scripts if not carefully tuned) and applying output-encoding or sanitization rules at the WAF or dispatcher layer (a partial measure that does not remove the stored payload from all render paths). Because a victim must also browse to the poisoned page (UI:R), monitoring and promptly purging suspicious form submissions offers a limited supplementary mitigation. With no indication of active exploitation and an EPSS score of only 0.20%, treating this as a normal patch-cadence item rather than an emergency is reasonable.

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 user-controllable input during page generation, in its stored variant: crafted input submitted to an AEM form field is persisted server-side and later emitted into HTML without adequate encoding or sanitization. The CVSS vector includes S:C (scope change), meaning the injected script runs in the security context of the victim's browsing session and can reach resources beyond the vulnerable component's original privilege boundary, while the vector simultaneously caps confidentiality and integrity impact at Low (C:L/I:L) with no availability impact (A:N), reflecting the limited blast radius of a low-privileged author's stored payload. The provided CPE data confirms the affected footprint spans Adobe Experience Manager 6.5.23 and earlier across the on-premise 6.5 track, the 6.5 LTS channel (cpe:2.3:a:adobe:experience_manager:6.5:-:*:*:lts:*:*:*), and AEM Cloud Service; per the assessed vector, exploitation depends on an authenticated low-privileged account (PR:L) together with a distinct victim viewing the poisoned page (UI:R).

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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

Attacker needs a low-privileged account to store the payload (PR:L), a victim must load the page (UI:R), and script runs in the victim's browser context (S:C) with Low 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 91% exploitable
Prevalence
High
widely-deployed enterprise web content management 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
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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