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CVE-2025-34509 is a hardcoded-account vulnerability in Sitecore Experience Manager (XM) and Experience Platform (XP). The embedded account can be used by an unauthenticated remote attacker to authenticate to Sitecore administrative API functionality over HTTP. Affected releases are XM/XP 10.1 through 10.1.4 rev. 011974 PRE, all 10.2 releases, 10.3 through 10.3.3 rev. 011967 PRE, and 10.4 through 10.4.1 rev. 011941 PRE.
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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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Sitecore Experience Platform vulnerability covered by SC2025-003 that could lead to remote code execution and unauthorized information access.
Authentication bypass in Sitecore (used as a chaining primitive) to obtain credentials/authenticate, enabling follow-on steps (e.g., uploading a crafted DLL) that, when combined with CVE-2025-3600-triggered assembly resolution, can lead to RCE.
A previously disclosed Sitecore deserialization vulnerability referenced alongside other recent Sitecore flaws.
Unknown (listed as a trending CVE without details in the content).
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.