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Adobe Experience Manager CVE-2025-64850

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-priv AEM user
  2. Delivery
    Inject script into vulnerable form field
  3. Exploit
    Payload stored server-side
  4. Execution
    Victim browses affected page
  5. Persist
    Malicious JS executes in victim browser
  6. Impact
    Session/data compromise in browser 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/save data into one of the affected form fields, plus a separate victim (UI:R) who must subsequently browse to the page rendering the injected field for the stored payload to execute. Affected deployments are AEM 6.5.23 and earlier, AEM Cloud Service, and AEM 6.5 LTS. Limiting factors: no unauthenticated path, mandatory victim interaction, browser-side-only impact (no server compromise), and low confidentiality/integrity effect scoped to the victim's browser session.

Impact

All signals point to a genuine but low-priority issue. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N = 5.4 MEDIUM) is doubly gated: it requires an authenticated low-privileged account (PR:L) AND victim user interaction (UI:R, the victim must browse to the page hosting the injected field). The scope change (S:C) reflects that injected script runs in the victim's browser trust context rather than the server, and impact is limited to low confidentiality and integrity (C:L/I:L) with no availability effect. EPSS is very low at 0.20% (9th percentile), consistent with the absence of any public exploit and the interaction/auth prerequisites that make mass exploitation impractical. This is NOT in CISA KEV and there is no POC reference - the only source is the Adobe vendor advisory. No SSVC decision data was provided in the input. Net: this is a real, valid stored-XSS bug worth patching in scheduled maintenance, not a fire-drill; the high notional reach of AEM does not translate into high real-world risk because of the compounded low-privilege + user-interaction gating and the limited technical impact.

Exploit ScenarioDerived

A low-privileged authenticated AEM user (e.g., a content author) enters a malicious JavaScript payload into a vulnerable form field, which is stored server-side. When another user - such as an administrator or reviewer - later browses to the page rendering that field, the script executes in their browser, enabling session-context actions like cookie/token theft or UI manipulation. No public exploit code is identified at time of analysis, and success depends on a victim actually viewing the affected page.

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, AEM 6.5 LTS, and AEM Cloud Service lets a low-privileged authenticated user inject malicious JavaScript into form fields, which then executes in the browser of any victim who later views the affected page. The flaw (CWE-79) is rated CVSS 5.4 with a scope change because the payload runs in the victim's browser session, and exploitation requires both an authenticated authoring account and a separate victim who browses to the compromised page. No public exploit code or confirmed active exploitation has been identified, and EPSS places the likelihood of exploitation in the bottom decile at 0.20% (9th percentile); consistent with this, all signals point to a genuine but low-priority issue.

RemediationAI

Adobe has released security bulletin APSB25-115 for this stored XSS issue, and the primary action is to apply the vendor-provided update for AEM 6.5, AEM 6.5 LTS, and AEM Cloud Service as described in the advisory, consulting https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html for the exact patched release because the available data does not specify a fixed version number. If immediate upgrade is not possible, reduce exposure by restricting which low-privileged accounts can submit or edit content in form fields on published pages, noting that this may disrupt legitimate authoring workflows; audit and clean existing stored form field content for injected scripts; and enforce input validation and HTML output encoding on any custom form components. Deploying a content security policy that disallows inline script can reduce but not fully eliminate impact, since stored payloads may still render through legitimate form markup, and because exploitation requires an authenticated authoring account plus a victim who browses to the page, removing stale or unnecessary author accounts and periodically reviewing form content provide meaningful compensating risk reduction.

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

Adobe Experience Manager is a Java-based enterprise content management system built on Apache Sling and the Granite platform, where authors submit content through form fields and components that are later rendered to site visitors. CVE-2025-64850 is a stored, or persistent, cross-site scripting vulnerability (CWE-79) in which user-supplied input saved into a vulnerable form field is not adequately sanitized or output-encoded before being returned to other users' browsers. Unlike reflected XSS, the payload persists in the repository and executes whenever a victim loads the affected page, which is why the CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N includes a scope change (S:C) and a low integrity and confidentiality impact limited to the victim's browser context. The CPE entries cpe:2.3:a:adobe:experience_manager:*:*:*:*:-:*:*:* for on-premise releases, cpe:2.3:a:adobe:experience_manager:6.5:-:*:*:lts:*:*:* for the long-term support channel, and cpe:2.3:a:adobe:experience_manager:*:*:*:*:aem_cloud_service:*:*:* for the cloud service confirm the affected delivery models. There is no unauthenticated path, no server-side code execution, and no evidence that the flaw can be leveraged beyond the victim's browser session.

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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 by a low-priv authed user (PR:L), requires victim page view (UI:R), script crosses into browser trust boundary (S:C) with limited 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: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 concentrated in large-org deployments
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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