CVE-2026-48257 experience manager vulnerability
Adobe Experience Manager is affected by a DOM-based Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this issue by manipulating the DOM environment to execute malicious JavaScript within the context of the victim's browser. Exploitation of this issue requires user interaction in that a victim must visit a crafted webpage. Scope is changed.
Browse Browser security risksQuick answer
adobe experience manager should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- AEM Cloud Service 2026.5.0 and earlier
- AEM 6.5 LTS SP2 and earlier
- AEM 6.5 SP25 and earlier
Fixed versions
- AEM Cloud Service 2026.6.0
- AEM 6.5 LTS SP2 + Hotfix NPR-43972
- AEM 6.5 SP25 + Hotfix NPR-43971
How to fix it
Adobe Experience Manager is affected by CVE-2026-48257, a DOM-based cross-site scripting flaw. A crafted page can run attacker-controlled script in a victim's AEM browser session after user interaction. Confirm AEM Cloud Service has received 2026.6.0; update AEM 6.5 LTS to SP2 and then apply Hotfix NPR-43972; or update AEM 6.5 to SP25 and then apply Hotfix NPR-43971, as applicable. Prioritize exposed production systems and accounts that can reach the affected feature.
- Inventory every Adobe Experience Manager deployment, version, exposed endpoint, environment, and owner.
- Inventory AEM Cloud Service, AEM 6.5 LTS, and AEM 6.5 deployments, then match each one to the affected products in APSB26-74.
- Confirm AEM Cloud Service has received 2026.6.0; update AEM 6.5 LTS to SP2 and then apply Hotfix NPR-43972; or update AEM 6.5 to SP25 and then apply Hotfix NPR-43971, as applicable.
- Adobe lists no workaround in APSB26-74. Until the update is complete, limit users to trusted AEM links and restrict access to the affected interface.
- Review crafted URLs, suspicious DOM input, content changes, and account actions after users opened external links.
- Revoke exposed sessions, remove malicious content or links, and review user, workflow, and configuration changes.
- Restart or redeploy affected AEM services as required by Adobe, clear AEM and CDN caches, and keep temporary controls until validation is complete.
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Verify the fix
- Confirm AEM Cloud Service is on 2026.6.0 or later, or verify both AEM 6.5 LTS SP2 plus Hotfix NPR-43972, or both AEM 6.5 SP25 plus Hotfix NPR-43971, on every applicable deployment.
- Open a safe crafted-input test and confirm the DOM does not turn attacker-controlled data into executable script.
- Confirm AEM Author and Publish exposure, Dispatcher and CDN/WAF rules, outbound access, and service-account permissions follow the deployment's approved security baseline.
- Review logs after remediation for continued exploit attempts or signs that the issue was used before the fix.
- Rerun the relevant dependency, platform, vendor, or Fixnx security check and document the result, affected assets, change record, and cleanup evidence for CVE-2026-48257.
Related categories
Related security risks
More published guidance from the same primary category.
Trusted references
FAQ
What is affected by CVE-2026-48257?
adobe experience manager versions listed as affected should be reviewed: AEM Cloud Service 2026.5.0 and earlier, AEM 6.5 LTS SP2 and earlier, AEM 6.5 SP25 and earlier.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.