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Adobe Experience Manager CVE-2025-64875

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 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
    Session/data theft in AEM context

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 a low-privileged but authenticated AEM account with write access to one of the vulnerable form fields (PR:L) - this is not remotely reachable by an anonymous attacker. Exploitation is further limited by required victim interaction: a second user must navigate to the page hosting the injected field (UI:R) before the stored payload executes. Applies to Adobe Experience Manager 6.5.23 and earlier, including AEM Cloud Service and the 6.5 LTS build. Impact is confined to the victim's browser session (C:L/I:L, A:N); there is no direct server-side code execution.

Impact

This is a genuinely low-priority issue despite a MEDIUM 5.4 CVSS score. The vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N is doubly gated: the attacker must already hold a low-privileged authenticated AEM account (PR:L) capable of writing to a vulnerable form field, AND a victim must subsequently browse to the page (UI:R) for the stored script to fire. Impact is capped at C:L/I:L with no availability impact - this is browser-side script execution in a victim's session, not server compromise. Exploitation signals reinforce low real-world urgency: EPSS is 0.20% (9th percentile), there is no CISA KEV listing, and no public proof-of-concept is identified. The scope change (S:C) - script from the AEM origin executing in the victim's browser context - is the main reason this lands above 4.0. No signals conflict; every source (Adobe PSIRT, NVD, EPSS) points the same direction: a real but low-severity, opportunistically-exploitable stored XSS.

Exploit ScenarioDerived

A low-privileged AEM author or content contributor injects a malicious JavaScript payload into a vulnerable form field. When a higher-privileged user (e.g., an administrator or reviewer) later browses the page containing that field, the stored script executes in their browser under the AEM origin, enabling session-token theft or actions performed as the victim. No public exploit code is currently identified.

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

Adobe Experience Manager 6.5.23 and earlier, including the 6.5 LTS build and AEM Cloud Service, is affected by stored cross-site scripting (CWE-79) in which a low-privileged, authenticated author can persist malicious JavaScript into vulnerable form fields that then executes in the browser of any user who browses the page hosting that field. Exploitation therefore requires two distinct parties: an attacker holding a valid AEM account with write access to the affected field (PR:L, so not anonymously reachable), and a separate victim who is induced or simply happens to visit the poisoned page (UI:R). Impact is confined to the victim's browser session - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N scores it 5.4 (Medium) with no server-side code execution - and no public exploit code has been identified at time of analysis, with EPSS at 0.20% (9th percentile) and no CISA KEV listing.

RemediationAI

Apply the fix documented in Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html); the advisory is the authoritative source for the exact patched release or hotfix identifier for the 6.5 LTS and earlier branches, and organizations should upgrade to that build rather than relying on 6.5.23, which is explicitly vulnerable. AEM Cloud Service customers will receive the correction automatically and need only verify the instance has been updated, while on-premise and LTS operators must schedule the service pack/hotfix themselves. Where immediate upgrade is not feasible, compensating controls include tightening authoring permissions so that only fully trusted roles can create or edit form fields, since exploitation requires a low-privileged but authenticated account with write access; restricting or temporarily removing the affected form component from published templates; and applying a strict Content-Security-Policy plus WAF rules that block inline script execution and known XSS payload patterns - each of these reduces exploitability but carries trade-offs such as broken legitimate inline scripts, template functionality loss, or false-positive blocking, so they should be treated as interim measures only. Because the payload executes for downstream viewers, also consider auditing recently authored form content for injected scripts before restoring normal publishing.

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 (stored) cross-site scripting condition in Adobe Experience Manager's form-field handling, classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). Rather than reflecting attacker input immediately, the payload is written into a form field and saved server-side; when the containing page is later rendered to another user, the unescaped content is delivered as part of the HTML/JS response and runs in that user's origin context. The CVSS scope change (S:C) reflects that the injected script executes with the privileges and origin of the AEM page rather than the authoring interface that accepted it, and the altered scope is what elevates the score above a purely self-inflicted script injection. The supplied CPE data - cpe:2.3:a:adobe:experience_manager:*, the aem_cloud_service edition, and the 6.5 LTS release line - confirms the issue spans the on-premise 6.5 branch up to and including 6.5.23 as well as the cloud-hosted service, meaning both self-managed and Adobe-hosted deployments are in scope. Because the vulnerable surface is content authoring (form fields) rather than public unauthenticated endpoints, the realistic attack path involves a low-trust internal author or a compromised authoring account staging content that a higher-privileged editor, administrator, or site visitor subsequently loads.

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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 app but requires authenticated low-priv author to store payload (PR:L) and victim page view (UI:R); XSS crosses to browser context (S:C) with limited C/I 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
widely-used enterprise CMS but authoring access limited to internal users
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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