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Medium

Stored XSS in Adobe Experience Manager Forms JEE

IdentifiersCVE-2026-34691CWE-79· Improper Neutralization of Input…

CVE-2026-34691 is a stored cross-site scripting vulnerability in Adobe Experience Manager Forms JEE affecting LTS SP1, version 6.5.24.0, and earlier. The flaw allows an attacker to inject malicious JavaScript into vulnerable form fields. Because the payload is stored, the script executes later in a victim’s browser when the victim browses to a page containing the malicious field. The available information does not identify a specific vulnerable function or code path, but the issue is explicitly described as stored XSS in form-field handling.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause attacker-controlled JavaScript to execute in the victim’s browser in the security context of the affected application. This can enable theft or misuse of session data, unauthorized actions on behalf of the victim, and potential elevated access or control over the victim’s account or session. The provided CVSS vector indicates changed scope and high confidentiality and integrity impact, with no direct availability impact.

Mitigation

If you can’t patch tonight, do this now.

Until patches are fully deployed, reduce exposure by restricting who can submit or modify form-field content, validating and sanitizing untrusted input before storage, and ensuring context-appropriate output encoding when rendering stored form data in web pages. Additional defensive measures such as Content Security Policy may reduce exploitability or impact, but they are compensating controls and not a substitute for patching.

Remediation

Patch, then assume compromise.

Apply the vendor-provided security update from Adobe for Adobe Experience Manager Forms JEE referenced in APSB26-57. Upgrade from affected releases, including LTS SP1 and 6.5.24.0 and earlier, to a fixed version provided by Adobe.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
AdobeExperience Managerapplication
AdobeExperience Manager Forms Jeeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

3 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-34691
NVD
nvd.nist.gov/vuln/detail/CVE-2026-34691
MITRE CWE · CWE-79
Improper Neutralization of Input During Web…
Vendor Advisory
helpx.adobe.com/security/products/aem-forms/apsb26-57.html