[wp-hackers] CSRF vulnerability in WP HTML Sitemap 1.2 (WordPress plugin)
harry at dxw.com
Fri Mar 28 12:39:23 UTC 2014
Software: WP HTML Sitemap
CVSS: 4.3 (Medium; AV:N/AC:M/Au:N/C:N/I:P/A:N)
CSRF vulnerability in WP HTML Sitemap 1.2
A CSRF vulnerability exists which allows an attacker to delete the
sitemap if a logged-in admin user visits a link of the attacker’s choosing.
Line 202 of inc/AdminPage.php says “// check whether form was just
submitted” but the following if/elseif statements only check whether a
particular button was pressed without checking nonce values. The form in
question is printed in wp_html_sitemap_AdminPage::createSitemapForm()
around line 146 of the same file.
Proof of concept
This form deletes the sitemap without requiring a nonce value:
<input type="text" name="deleteSitemap" value="Delete Sitemap">
Disable the plugin until a fix is available.
dxw believes in responsible disclosure. Your attention is drawn to our
disclosure policy: https://security.dxw.com/disclosure/
Please contact us on security at dxw.com to acknowledge this report if you
received it via a third party (for example, plugins at wordpress.org) as
they generally cannot communicate with us on your behalf.
Please note that this vulnerability will be published if we do not
receive a response to this report with 14 days.
2014-03-28: No response received. Published
Discovered by dxw:
Please visit security.dxw.com for more information.
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