Slack vulnerabilities
4 vulnerabilities
Known vulnerabilities in Slack products, newest first, with CVSS severity, EPSS, KEV listings and ransomware use, across 2 products.
Products
2- Nebula3 vulnerabilities
- Wp Slacksync1 vulnerabilities
CVE-2025-62820chainguardcaddy+20
EPSS score0.22%
Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.CVE-2020-11498slacknebulaEPSS score3.40%
Slack Nebula through 1.1.0 contains a relative path vulnerability that allows a low-privileged attacker to execute code in the context of the root user via tun_darwin.go or tun_windows.go. A user can also use Nebula to execute arbitrary code in the user's own context, e.g., for user-level persistence or to bypass security controls. NOTE: the vendor states that this "requires a high degree of access and other preconditions that are tough to achieve."CVE-2019-14366slackwp_slacksync+1EPSS score1.68%
WP SlackSync plugin through 1.8.5 for WordPress leaks a Slack Access Token in source code. An attacker can obtain a lot of information about the victim's Slack (channels, members, etc.).CVE-2026-25793chainguardcaddy+14EPSS score0.18%
Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. This issue has been patched in version 1.10.3.