CVE-2021-39229

Apprise is an open source library which allows you to send a notification to almost all of the most popular notification services available. In affected versions users who use Apprise granting them access to the IFTTT plugin (which just comes out of the box) are subject to a denial of service attack on an inefficient regular expression. The vulnerable regular expression is [here](https://github.com/caronc/apprise/blob/0007eade20934ddef0aba38b8f1aad980cfff253/apprise/plugins/NotifyIFTTT.py#L356-L359). The problem has been patched in release version 0.9.5.1. Users who are unable to upgrade are advised to remove `apprise/plugins/NotifyIFTTT.py` to eliminate the service.

• CWE-400
• CWE-400

• https://github.com/caronc/apprise/blob/0007eade20934ddef0aba38b8f1aad980cfff253/apprise/plugins/NotifyIFTTT.py#L356-L359Exploit, Third Party Advisory
• https://github.com/caronc/apprise/pull/436Patch, Third Party Advisory
• https://github.com/caronc/apprise/security/advisories/GHSA-qhmp-h54x-38qrThird Party Advisory
• https://github.com/caronc/apprise/blob/0007eade20934ddef0aba38b8f1aad980cfff253/apprise/plugins/NotifyIFTTT.py#L356-L359Exploit, Third Party Advisory
• https://github.com/caronc/apprise/pull/436Patch, Third Party Advisory
• https://github.com/caronc/apprise/security/advisories/GHSA-qhmp-h54x-38qrThird Party Advisory

Published

Sep 20, 2021

Last Modified

Jun 17, 2026

Status

Modified

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