CVE-2006-2918

The Lanap BotDetect APS.NET CAPTCHA component before 1.5.4.0 stores the UUID and hash for a CAPTCHA in the ViewState of a page, which makes it easier for remote attackers to conduct automated attacks by "replaying the ViewState for a known number."

What this means for your business

It affects Lanap Botdetect Captcha Asp.Net. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network.
FIRST's prediction model gives it a 2% chance of attack attempts being seen in the next 30 days, ranking above 74% of all known flaws.

What to do

1Check whether your company or your suppliers run Lanap Botdetect Captcha Asp.Net, and which version. The affected versions are listed further down this page.
2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

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Scoring

CVSS: 5.0 (v2.0)
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-264
Assigned by: cve@mitre.org

Dates

Published: 2006-06-23
Last modified: 2026-09-23
Sources: NVD

Affected products

Lanap Botdetect Captcha Asp.Netall versions

As listed in the NVD configuration data. Not a statement about your estate.