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Adobe Experience Manager CVE-2025-64579

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 author
  2. Delivery
    Inject JavaScript into vulnerable form field
  3. Exploit
    Payload stored persistently in AEM
  4. Execution
    Victim browses page rendering field
  5. Persist
    Script executes in victim's session
  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 AEM account (PR:L) with the ability to write into form fields that are persisted and later rendered - this is the specific vulnerable surface named in the description. It further requires victim user interaction (UI:R): a separate user must browse to the page containing the stored malicious field for the payload to fire. These two prerequisites - valid authoring-level credentials plus a victim visiting the affected page - materially limit exploitation versus an unauthenticated drive-by, and impact is confined to confidentiality and integrity of the victim's browser session (A:N, no availability impact).

Impact

This is a genuinely moderate-priority issue, not an inflated high-severity one - all signals align toward low real-world urgency. The CVSS 3.1 base score is 5.4 (Medium), and its vector confirms meaningful friction: AV:N allows remote reach, but PR:L requires the attacker to already hold a low-privileged authenticated account, and UI:R means a victim must actively browse to the page hosting the injected payload. EPSS reinforces this: 0.25% probability at the 15th percentile indicates very low expected exploitation volume. There is no CISA KEV listing and no public exploit code identified in the provided data, so exploitation status is 'no public exploit identified at time of analysis.' No SSVC decision data was supplied. The one signal worth noting is scope change (S:C) with C:L/I:L - consistent with stored XSS where injected script executes in another user's authenticated session, potentially an administrator, which is why the score lands above a trivial 4.x despite the authentication and interaction prerequisites. Net: a real but constrained vulnerability suited to routine patch-cycle remediation rather than emergency response.

Exploit ScenarioDerived

A low-privileged authenticated AEM author submits a form field containing malicious JavaScript, which is stored persistently. When a higher-privileged user - such as a content reviewer or administrator - later browses to the page rendering that field, the script executes in their authenticated browser context, enabling session-context actions or data theft. No public proof-of-concept exploit was identified in the provided data.

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 14, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier allows an authenticated low-privileged user to inject persistent malicious scripts into form fields, which then execute in the browser of any separate victim who views the affected page. Exploitation requires valid authoring-level credentials and victim interaction, and impact is limited to the victim's browser session confidentiality and integrity. No public exploit code or active exploitation has been identified; EPSS is 0.25% (15th percentile), indicating low real-world urgency.

RemediationAI

Patch available per vendor advisory: apply the update described in Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html). For AEM Cloud Service, updates are applied by Adobe; for on-premise 6.5 LTS, install the latest service pack or cumulative fix pack that includes the fix for CVE-2025-64579 - consult the advisory for the exact patched version since the input data does not specify one. If patching is delayed, reduce the attack surface by limiting form-field authoring permissions to trusted users only (this can hinder legitimate content authoring), enforce a restrictive Content Security Policy to block inline script execution (may break AEM components that rely on inline scripts), and ensure all form-field input is properly encoded on output. Monitor stored form content for suspicious scripts.

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 cross-site scripting (XSS) issue (CWE-79: Improper Neutralization of Input During Web Page Generation) in Adobe Experience Manager's form field handling. CPE entries confirm affected products include Adobe Experience Manager (generic), AEM Cloud Service, and the 6.5 LTS release line. The root cause is insufficient sanitization or output encoding of user-supplied input that is persisted and later rendered in a web page. Because the payload is stored, it is served to other users who visit the page, and the malicious JavaScript executes in their browser context, leading to a scope change (S:C) as the script runs under the victim's session. The CVSS vector (AV:N/AC:L/PR:L/UI:R) indicates the attacker needs network access, low privileges, and the victim must interact by browsing to the affected page; availability impact is none.

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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 reachable over network but needs a low-privileged account (PR:L) to inject and victim interaction (UI:R); script runs in another user's context, so 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: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 85% exploitable
Prevalence
High
Widely-deployed enterprise CMS used by large organizations
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
High

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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