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Adobe Experience Manager CVE-2026-110037

| EUVDEUVD-2026-100541 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-10-13 psirt@adobe.com GHSA-g6wf-45vh-gjf4
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 AEM user
  2. Delivery
    Inject malicious script into vulnerable form field
  3. Exploit
    Script stored server-side
  4. Execution
    Victim browses affected page
  5. Persist
    Script executes in victim browser
  6. Impact
    Session hijack or actions as victim

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 account with at least low privileges in Adobe Experience Manager (PR:L) - specifically the ability to submit or edit content in affected form fields - so anonymous external exploitation is not possible. Execution additionally requires victim interaction (UI:R): a separate user must browse to the page rendering the stored, unsanitized field before the injected JavaScript runs. Affected deployments are AEM 6.5 up to and including 6.5.25 and AEM 6.5 LTS up to SP3; environments already patched per APSB26-152 or on later builds are not vulnerable. Risk is highest in multi-author, multi-tenant, or externally-facing content-authoring setups where low-trust accounts can inject content consumed by higher-privileged users or site visitors.

Impact

This is a moderate-severity stored XSS (CVSS 5.4, CWE-79) with signals that point to real but bounded risk. The provided CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates network-reachable, low-complexity exploitation but requires an authenticated low-privileged account (PR:L) AND victim interaction (UI:R), both of which dampen mass-exploitation potential. Scope is changed (S:C), reflecting that injected script executes in a victim's browser context distinct from the vulnerable AEM component - the classic stored-XSS scope shift that justifies the elevated-over-baseline score. No EPSS score, KEV listing, POC, or SSVC decision data was provided in the input, so exploitation probability cannot be quantified from these sources; absence of KEV/POC is not evidence of safety but does argue against widespread automated exploitation today. The vendor (Adobe PSIRT) reported and patched this (APSB26-152), which is consistent with responsible disclosure rather than observed in-the-wild abuse. Net: a legitimate patch-management priority for AEM operators - especially multi-author/multi-tenant deployments - but not an emergency drop-everything issue absent any exploitation evidence. No conflicting signals were detected between the CVSS vector and the description; both agree on authenticated input with victim-triggered execution.

Exploit ScenarioDerived

A low-privileged AEM author or form contributor submits a form field containing malicious JavaScript, which is stored and later rendered unsanitized. When a higher-privileged user or site visitor browses the page containing the tainted field, the script executes in their browser, enabling session/cookie theft or actions performed as the victim. No public exploit code was identified in the provided data, but stored XSS in CMS form fields is a well-understood, low-complexity technique.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 14, 2026

Stored cross-site scripting in Adobe Experience Manager 6.5 (up to and including 6.5.25) and AEM 6.5 LTS (up to and including SP3) allows a low-privileged, authenticated author to plant malicious JavaScript inside vulnerable form fields so that it later executes in the browser of any user who browses to the page rendering that field. The vulnerable component is a classic CWE-79 input-neutralization failure in a content-management authoring surface, and the CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C, 5.4) confirms the attacker must hold at least a low-privileged account and that a separate victim must interact with the poisoned page; anonymous external exploitation is not possible without such an account. Impact is bounded to confidentiality and integrity of the victim's session while scope is changed, meaning the injected script can affect resources outside the vulnerable component's security context; no public exploit identified at time of analysis and the KEV catalog does not list this CVE.

RemediationAI

The primary fix is the vendor update described in Adobe security bulletin APSB26-152, available at https://helpx.adobe.com/security/products/experience-manager/apsb26-152.html; consult that bulletin for the exact fixed build for AEM 6.5 and AEM 6.5 LTS, since the aggregated source data does not enumerate a specific hotfix or service-pack number, and confirm the resulting version exceeds 6.5.25 or 6.5 LTS SP3. Until the update is applied, compensating controls should be layered and their trade-offs understood: restrict author- and contributor-level accounts in the AEM author tier to the minimum population and privilege needed, since PR:L means any low-privileged account is a viable injection point - the cost is reduced authoring throughput and additional identity-governance overhead; enforce a strict Content Security Policy on author and publish tiers to blunt inline script execution, accepting that legacy custom components may break and require allowlisting; apply context-aware output escaping of stored form-field values (for example via HTL/Sightly expression contexts and server-side sanitization of submitted form data) to remove the injection sink at its source, which requires code review and regression testing of every affected form component; and review/validate previously submitted form content for injected markup before re-enabling affected pages. Detection should focus on anomalous stored markup in form fields and on unexpected script execution attributed to authoring accounts, with particular attention to multi-author, multi-tenant, or externally facing authoring deployments where low-trust contributors and high-privilege reviewers share content. Note that at time of analysis no public exploit code had been identified, so prioritization should be driven by exposure of the author tier rather than by observed exploitation, and the absence of exploit code should not be read as evidence that the flaw is unexploitable by a motivated insider.

Affected VersionsENISA

Adobe Experience Manager 6.5 0 ≤6.5.25
Adobe Experience Manager 6.5 LTS 0 ≤6.5 LTS SP3

Affected Packages

euvd adobe_experience_manager_6_5 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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 improper neutralization of user-controllable input during web page generation (CWE-79), specifically the stored (persistent) variant: untrusted content submitted through AEM form fields is persisted server-side and later rendered without adequate output encoding, so the payload is delivered to every subsequent viewer of that page rather than only to the submitter. Adobe Experience Manager is a Java-based enterprise content management and digital experience platform whose authoring tier (Granite UI / Sling-based components and forms) is a distinct trust boundary from the publish tier; the CVSS scope-change flag (S:C) reflects that the script executes in the victim's browser against the AEM origin and can reach resources and privileges beyond the single vulnerable component that stored the value. The vector's PR:L prerequisite is a genuine control, not a formality: with any usable low-privileged author or contributor role at least one foothold already exists, and the UI:R prerequisite means delivery depends on a second party navigating to the crafted page - typically a higher-privileged author, an administrator reviewing content, or a public site visitor. Practical chaining targets include session/cookie theft, CSRF-token harvesting for privileged state changes in the author UI, and administrative-style actions performed under the victim's session context. Per the accompanying assessment, affected builds are AEM 6.5 through 6.5.25 and AEM 6.5 LTS through SP3, and installations already updated per Adobe bulletin APSB26-152 or running later builds are not considered vulnerable.

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  • Exploit and PoC references, threat intelligence from 22 sources

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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-privileged injection gives PR:L; stored payload needs a victim to load the page, so UI:R; cross-context browser execution yields 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: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 is 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. Scope is changed.

Threat Intelligence Overview

EPSS Score
0.4%
Top 72% exploitable
Prevalence
High
widely deployed enterprise CMS across large organizations and governments
Data Quality
5 sources
Confidence: Medium

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 0.4%
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
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

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.

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