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CVE-2025-20240 is a reflected cross-site scripting vulnerability in the Web Authentication feature of Cisco IOS XE Software. According to the provided content, the flaw is caused by improper sanitization of user-supplied input in the device management/web authentication interface. An unauthenticated remote attacker can exploit the issue by crafting a malicious link and persuading a user to follow it. If triggered in a victim’s browser, the injected script is reflected by the affected device and executed in the security context of the Cisco IOS XE web interface.
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What an attacker gets, and what they’ve been doing with it.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A cross-site scripting vulnerability in the Cisco IOS XE management interface.
A cross-site scripting vulnerability in the Cisco IOS XE management interface.
A reflected cross-site scripting (XSS) vulnerability in Cisco IOS/IOS XE that could allow attackers to steal session cookies.
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.