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Adobe Experience Manager CVE-2025-64822

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 author 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 hijack or content manipulation

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 authenticated low-privileged account on the AEM instance (PR:L) with the ability to submit data into one of the vulnerable form fields; the stored payload only fires when a victim subsequently navigates to the page rendering that field (UI:R), so it is not self-triggering. Limiting factors: attacker must already have valid author/contributor-level access to the AEM authoring environment, a separate victim must visit the affected page, and only AEM 6.5.23 and earlier (including AEM Cloud Service and 6.5 LTS) are affected. No availability impact and only limited confidentiality/integrity impact result.

Impact

This is a high-CVSS-in-name-only issue that lands squarely at MEDIUM (5.4) and is LOW real-world priority. The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N is doubly gated: it requires an authenticated low-privileged attacker (PR:L) to plant the payload AND a victim to browse to the affected page (UI:R), with only Low confidentiality/integrity impact and no availability impact. Scope is Changed (S:C) because injected script executes in the victim's browser context rather than the server's. Exploitation signals are weak and mutually consistent: EPSS is 0.25% (15th percentile), there is no CISA KEV listing and no public exploit identified at time of analysis. No SSVC decision was supplied, but the low technical impact and non-automatable, interaction-dependent flow argue against prioritization. No signals conflict here - CVSS, EPSS, and the absence of KEV/POC all point the same direction: a genuine but low-severity stored XSS meriting routine patching, not emergency response. The only elevating factor is that AEM is enterprise-grade software often holding sensitive content, so the flaw should not be dismissed outright.

Exploit ScenarioDerived

A low-privileged AEM author account (e.g. a content contributor) enters a crafted JavaScript payload into a vulnerable form field, which is stored server-side. When a higher-privileged user or another visitor later browses to the page rendering that field, the script executes in their browser, enabling session-token theft or actions in the victim's authenticated context. No public proof-of-concept exploit has been identified for this specific CVE.

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 lets an authenticated low-privileged user (PR:L) persist malicious JavaScript into a vulnerable form field, which then executes in the browser of any other user who later views the page rendering that field (UI:R) - the payload is not self-triggering and requires a separate victim visit. Adobe Cloud Service and the 6.5 LTS track are also in scope, and the issue carries only limited confidentiality and integrity impact with no availability impact (CVSS 5.4), while EPSS is a low 0.25% (15th percentile) and no public exploit identified at time of analysis. Real-world priority is LOW-to-MEDIUM: exploitation presupposes legitimate author/contributor access to the AEM authoring environment plus a second user browsing the poisoned page.

RemediationAI

Apply the fix published by Adobe in security bulletin APSB25-115 (https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html) - patch available per vendor advisory, with the bulletin serving as the authoritative source for the exact fixed release for AEM 6.5 and the AEM 6.5 LTS service pack level; AEM as a Cloud Service customers are remediated automatically by Adobe's rolling updates, so verify the instance is on a current cloud release rather than pinning a local version. If immediate patching is not possible, restrict and review who holds author/contributor-level accounts on the AEM authoring tier, since the vulnerability cannot be reached without valid low-privileged authoring access - this is the single most effective compensating control, at the cost of some editorial workflow friction. As additional measures: audit and sanitize existing persisted content in form components for stored script payloads (removing injected fields closes the stored vector), deploy a WAF or reverse-proxy rule set that strips script-bearing HTML on form submission and response paths with the trade-off of possible false positives on legitimate rich-text content, and apply a Content Security Policy that disallows inline script on AEM-rendered pages, accepting that CSP tuning may break legacy components. Note that input filtering on its own is fragile here; output encoding of form field values at render time is the durable mitigation until the patched version is in place.

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 root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation), specifically the stored/persistent variant, in Adobe Experience Manager's form-field handling. AEM is a Java-based enterprise content management and digital experience platform whose authoring tier accepts structured content - including form component definitions and submitted field values - and persists it in the JCR content repository for later rendering by the publish tier. Because the vulnerable form fields do not adequately encode or sanitize stored input before it is emitted into HTML, an attacker with authoring rights can plant script content that is served to subsequent visitors and executed in their browser session context. The applicable CPE strings identify the affected lines as the general adobe:experience_manager product, the aem_cloud_service edition, and the 6.5 LTS release train, confirming that both on-premise 6.5.x deployments and the managed cloud service are impacted; Adobe's bulletin APSB25-115 is the authoritative vendor reference. The CVSS sub-score S:C (scope change) reflects that the injected script escapes the origin of the injected content and acts against the victim's session, which is why stored XSS in a CMS auth-adjacent surface matters despite the modest base score.

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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

Authenticated low-priv author injects stored script (PR:L), victim must load the page (UI:R), browser-context execution crosses scope (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 85% exploitable
Prevalence
Medium
enterprise Java/Sling 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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