Security readout for executives and security teams
Plain-English summary
A low-privileged user could save malicious script content in certain Adobe Experience Manager form fields. When another person views the affected page, the script may run in their browser, potentially exposing session-accessible information or altering content within that user’s permissions.
Executive priority
Treat this as a planned, prompt remediation rather than an emergency. Raise priority where untrusted contributors can edit forms, administrators commonly view submitted content, or authoring interfaces are internet-accessible. Confirm scope quickly because stored XSS can turn a low-privileged account into a browser-based path against more privileged users.
Technical view
CVE-2026-27242 is a stored cross-site scripting vulnerability (CWE-79) reachable over the network with low privileges and victim interaction. It has CVSS 3.1 score 5.4. Successful exploitation can cross a security boundary and cause limited confidentiality and integrity impact, without a stated availability impact.
Likely exposure
The bundle explicitly identifies AEM 6.5.23 and earlier. It also lists applicability boundaries involving AEM as a Cloud Service 2026.2.0, AEM 6.5 LTS SP2, and AEM 6.5 version 6.5.24. Confirm exact deployment applicability against Adobe APSB26-24 because the supplied range representation is ambiguous.
Exploitation context
The attacker requires low privileges to store content in a vulnerable field, and a victim must visit the resulting page. The bundle marks KEV false and provides no evidence of active exploitation or a public exploit. This does not establish that exploitation has never occurred.
Researcher notes
The CVSS vector is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The supplied description clearly names AEM 6.5.23 and earlier, but the structured product entries are insufficiently explicit about range semantics. Researchers should rely on APSB26-24 for exact edition-specific boundaries and should not infer broader affected versions from this bundle.
Mitigation direction
- Review Adobe APSB26-24 and apply the vendor-designated update for each deployed AEM edition.
- Prioritize internet-facing authoring environments and instances accessible to numerous low-privileged contributors.
- Until updated, restrict form-editing privileges to trusted users and review newly stored content.
- Use existing content-security controls as defense in depth, not as a substitute for Adobe’s update.
Validation and detection
- Inventory AEM editions, versions, service tiers, and externally reachable authoring interfaces.
- Compare every deployment with the exact affected and fixed ranges in Adobe APSB26-24.
- Confirm updates through deployment records and the version reported by each running instance.
- Review affected form content and audit logs for unexpected script-like markup or suspicious low-privileged edits.
- Verify relevant form fields safely encode or reject active content after remediation.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-27242 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7adobeVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/experience-manager/apsb26-24.htmlCVE reference, adobe · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.