CVE-2026-11903 is an improper neutralization of input during web-page generation vulnerability in the Ad Hoc module of Progress MOVEit Transfer. Insufficient output encoding permits stored or reflected attacker-controlled script content to be rendered in a user's browser, resulting in cross-site scripting. Affected releases are MOVEit Transfer 2026.0.0 before 2026.0.1, 2025.1.0 before 2025.1.4, and 2025.0.0 before 2025.0.8.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVSS 8 network-accessible cross-site scripting vulnerability in Progress MOVEit Transfer. Exploitation requires low privileges and user interaction.
A specific vulnerability addressed by Progress in MOVEit Transfer security advisories affecting listed MOVEit Transfer versions.
A cross-site scripting vulnerability in the Ad Hoc module of Progress MOVEit Transfer affecting multiple 2025 and 2026 versions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.