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Adobe Experience Manager CVE-2025-64797

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/credential 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

Exploitation requires an authenticated low-privileged AEM account (PR:L) with the ability to submit content into a vulnerable form field, plus a victim who subsequently browses to the page rendering that field (UI:R). It affects AEM 6.5.23 and earlier, including AEM Cloud Service and AEM 6.5 LTS per the CPEs. The stored nature means the attacker must have write access to a persisted field and cannot trigger execution without a victim visiting the affected page - both the authentication requirement and the required user interaction meaningfully limit realistic exploitation.

Impact

This is a genuine but low-priority vulnerability. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, base 5.4 MEDIUM) is internally consistent with the description: a stored XSS requiring both authentication (PR:L, low-privileged AEM author/content account) and victim interaction (UI:R, a user must browse to the affected page). Scope-changed (S:C) reflects script executing in the victim's browser security context, but confidentiality and integrity impact are only Low (C:L/I:L) and there is no availability impact. EPSS is 0.25% (15th percentile), consistent with the absence of any public exploit or KEV listing - there is no evidence of active exploitation and no automatable mass-exploitation path (stored XSS requires per-target injection plus victim browsing). No signals conflict: low CVSS, low EPSS, no KEV, no POC all point the same direction. This should be patched in normal cycles, not as an emergency; the double gating (authentication + user interaction) substantially limits real-world exploitability despite AEM being a high-value enterprise CMS.

Exploit ScenarioDerived

A low-privileged AEM author account injects malicious JavaScript into a vulnerable form field, which is stored server-side. When another user (e.g., an administrator or reviewer) later browses to the page rendering that field, the script executes in their browser, enabling session token theft or actions on their behalf within AEM. 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 26, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5.23 and earlier allows an authenticated low-privileged attacker to inject malicious JavaScript into form fields, which then executes in the browser of a victim who visits the affected page. The attack requires a valid low-privileged account to persist the payload and a victim to interact with the crafted content, as reflected by the CVSS vector PR:L/UI:R. No public exploit identified at time of analysis, and the EPSS score is 0.25% (15th percentile), consistent with a genuine but low-priority issue.

RemediationAI

Apply the vendor update referenced in Adobe advisory APSB25-115 for Adobe Experience Manager; no exact fixed version is specified in the provided data, so consult the advisory for the patched release and upgrade path from 6.5.23 and earlier. Until patched, restrict low-privileged AEM accounts from submitting or editing rich form fields, enforce least privilege in content authoring roles, and review stored form content for injected scripts; these access controls reduce the PR:L path but may disrupt legitimate authoring workflows. As a defense-in-depth measure, deploy a strict Content Security Policy on AEM pages to limit script execution, though it can break legitimate UI functionality and requires testing. Monitor for suspicious form submissions and unexpected JavaScript in persisted content.

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 CWE-79 improper neutralization of input during web page generation (cross-site scripting) in Adobe Experience Manager, specifically affecting stored form fields. Because the payload is persisted, an attacker with permission to submit content into a vulnerable field (PR:L) can store script that later renders to other users (UI:R). The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N indicates network reachability, low attack complexity, low privileges required, required user interaction, scope change, and low confidentiality and integrity impact with no availability impact. CPE strings identify Adobe Experience Manager 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS as affected, so both on-premises AEM 6.5.x lines and the hosted Cloud Service track are in scope. The EPSS score of 0.25% (15th percentile) suggests low predicted exploitation activity, and no public exploit was identified in the provided data.

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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 web app, but injection requires a low-privileged authenticated account (PR:L) and script fires only when a victim views the page (UI:R); stored XSS crosses 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 85% exploitable
Prevalence
Medium
enterprise Java CMS, common in large orgs but not ubiquitous
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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