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Through a malicious URL that contained a quote character it was possible to inject HTML code in KMail's plaintext viewer. Due to the parser used on the URL it was not possible to include the equal sign (=) or a space into the injected HTML, which greatly reduces the available HTML functionality. Although it is possible to include an HTML comment indicator to hide content.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 23, 2016 |
| Debian | — | Upgrade kdepimlibsUpgrade kcoreaddons | Mar 31, 2017 | Oct 21, 2016 |
| Suse | — | Upgrade kcoreaddonsUpgrade libKF5CoreAddons5Upgrade kcoreaddons-langUpgrade kcoreaddons-devel | Nov 3, 2016 | Oct 18, 2016 |
| Ubuntu | — | Upgrade libkpimutils4 | Jul 1, 2017 | Oct 12, 2016 |
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