ABEVERLEY Dancer2::Plugin::Auth::Extensible up to 0.713 Password Reset Link Extensible.pm Host/X-Forwarded-Host/submit_reset/username password recovery

Summaryinfo

A vulnerability has been found in ABEVERLEY Dancer2::Plugin::Auth::Extensible up to 0.713 and classified as critical. The impacted element is the function _default_email_password_reset/_default_welcome_send of the file lib/Dancer2/Plugin/Auth/Extensible.pm of the component Password Reset Link. This manipulation of the argument Host/X-Forwarded-Host/submit_reset/username causes password recovery. This vulnerability is registered as CVE-2026-15689. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in ABEVERLEY Dancer2::Plugin::Auth::Extensible up to 0.713. Affected by this vulnerability is the function _default_email_password_reset/_default_welcome_send of the file lib/Dancer2/Plugin/Auth/Extensible.pm of the component Password Reset Link. The manipulation of the argument Host/X-Forwarded-Host/submit_reset/username with an unknown input leads to a password recovery vulnerability. The CWE definition for the vulnerability is CWE-640. The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send. Both default emails emit a link of the form `$base/login/$code`, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2's request->base function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender's choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set. Through 0.711 the handlers read `request->uri_base` and `request->base` directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted `request->uri_base` when unset. The default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender's host, which is enough to take over the account.

The advisory is shared at metacpan.org. This vulnerability is known as CVE-2026-15689 since 07/14/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2026). MITRE ATT&CK project uses the attack technique T1552 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-59758). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• ABEVERLEY

Name

• Dancer2::Plugin::Auth::Extensible

Version

• 0.713

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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