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Adobe Experience Manager CVE-2025-64550

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
    Craft DOM-XSS payload URL/page
  3. Exploit
    Lure victim to click crafted link
  4. Execution
    Client-side sink executes injected script
  5. Impact
    Run script in victim's AEM session 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 an attacker to hold a low-privileged authenticated account in Adobe Experience Manager (PR:L) AND requires victim user interaction (UI:R) - specifically, the victim must visit a crafted URL or interact with a manipulated web page that triggers the client-side DOM sink. Affected deployments are AEM 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS (per CPE strings). Impact is confined to the victim's browser context (C:L/I:L, no server-side code execution and no availability impact). The double gate of authentication plus user interaction, combined with only low confidentiality/integrity impact, substantially limits realistic exploitation despite the network attack vector.

Impact

This is a genuinely low-priority issue despite being a 'CRITICAL product' finding. All signals align toward low real-world risk: CVSS 3.1 base score is 5.4 (Medium) with vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - exploitation is double-gated by requiring both low-privileged authentication (PR:L) and victim user interaction (UI:R), and impact is limited to C:L/I:L with no availability effect. EPSS reinforces this: 0.22% probability at the 11th percentile, indicating very low predicted exploitation likelihood. The vulnerability is NOT in CISA KEV (no active exploitation), and no public POC is referenced - the only reference is Adobe's own advisory. There is no conflict between CVSS and description: the vector's PR:L and UI:R map cleanly onto the description's 'low privileged attacker' and 'requires user interaction such as visiting a crafted URL.' The scope change (S:C) is the sole factor lifting this above a pure ~3.x - justified because injected script executes in the victim's browser context across the AEM security boundary. Net: a real but low-severity client-side flaw, not an emergency. It should be patched on a routine cadence alongside the other APSB25-115 DOM-XSS fixes rather than escalated.

Exploit ScenarioDerived

A low-privileged authenticated AEM user (e.g., a content author account) crafts a URL or manipulated page that carries a malicious DOM-XSS payload, then lures a victim AEM user into clicking it. When the victim's browser processes the crafted input client-side, the attacker's script runs in the victim's AEM session context, enabling session/token theft or actions on the victim's behalf. No public exploit code is identified at time of analysis, and exploitation depends on both attacker authentication and victim interaction.

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

DOM-based cross-site scripting in Adobe Experience Manager 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS lets a low-privileged authenticated attacker inject malicious script that executes in a victim's browser when the victim visits a crafted URL or interacts with a manipulated page. Impact is confined to the victim's browser context (low confidentiality and integrity, no availability or server-side code-execution impact), and exploitation requires both a valid low-privileged AEM account and victim interaction, which substantially limits realistic exposure. No public exploit code has been identified at time of analysis, EPSS is low at 0.22% (11th percentile), and the issue is not listed in CISA KEV.

RemediationAI

Apply the fix referenced in Adobe security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html), which lists the remediated AEM release for the 6.5 and LTS tracks; AEM Cloud Service customers are updated by Adobe, while on-premise administrators should move off 6.5.23 and earlier to the version named in that advisory. Where immediate patching is not possible, deploy a Content Security Policy with a strict, nonce- or hash-based script-src and no 'unsafe-inline' so that injected inline script fails to execute in the AEM origin - the trade-off is that legitimate inline scripts and some third-party authoring widgets will break until refactored or whitelisted. Additionally, minimize the number of low-privileged AEM author accounts since the flaw requires an authenticated attacker (PR:L), and audit server-side rendering of URL fragments into DOM sinks with HTML entity encoding as a defense-in-depth measure. Note that patching is straightforward here and the practical risk is low given the dual authentication-plus-user-interaction gate and the limited browser-scoped impact; there is no vendor-released patch identified for any deployment that cannot be upgraded other than the bulletin's guidance.

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

This is a CWE-79 improper neutralization of input during web page generation, specifically the DOM-based XSS subtype: rather than the server reflecting attacker input into the HTML response, the vulnerable Adobe Experience Manager client-side JavaScript reads attacker-controllable data (typically a URL fragment, query parameter, or other client-side source) and writes it into a dangerous DOM sink such as innerHTML or document.write without encoding. Because the flaw lives entirely in the browser-side code, the malicious script runs in the origin of the AEM application, giving it access to the victim's session context for that origin; this is why the CVSS vector is scored with changed scope (S:C - the vulnerable component and the impacted component differ) while confidentiality and integrity impacts remain low. The attack vector is network (AV:N), complexity low (AC:L), but the attacker must hold a valid low-privileged authenticated account (PR:L) and the victim must be induced to load the crafted content (UI:R). Per the supplied CPE strings, affected builds span the Adobe Experience Manager product line, including the 6.5 track through 6.5.23, the AEM Cloud Service edition, and the AEM 6.5 LTS channel, meaning both on-premise 6.5.x deployments and managed cloud/enterprise LTS instances are in scope.

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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 but attacker needs a low-priv account (PR:L) and victim click (UI:R); browser-context script execution crosses a boundary (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: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 DOM-based Cross-Site Scripting (XSS) vulnerability that could be exploited by a low privileged attacker to execute malicious scripts in the context of the victim's browser. Exploitation of this issue requires user interaction, such as visiting a crafted URL or interacting with a manipulated web page.

Threat Intelligence Overview

EPSS Score
0.2%
Top 89% exploitable
Prevalence
Medium
Enterprise Java CMS, widely used but not ubiquitous like OS/web-server software
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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