CVE-2018-5702

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 11.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-01-15 · updated 2026-06-17

Description

Transmission through 2.92 relies on X-Transmission-Session-Id (which is not a forbidden header for Fetch) for access control, which allows remote attackers to execute arbitrary RPC commands, and consequently write to arbitrary files, via POST requests to /transmission/rpc in conjunction with a DNS rebinding attack.

Affected products

Debian Linux: 7.0, 8.0, 9.0
Transmissionbt Transmission: through 2.92

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=1447
https://github.com/transmission/transmission/pull/468
https://lists.debian.org/debian-lts-announce/2018/01/msg00020.html
https://security.gentoo.org/glsa/201806-07
https://twitter.com/taviso/status/951526615145566208
https://www.debian.org/security/2018/dsa-4087
https://www.exploit-db.com/exploits/43665/
https://bugs.chromium.org/p/project-zero/issues/detail?id=1447
https://github.com/transmission/transmission/pull/468
https://lists.debian.org/debian-lts-announce/2018/01/msg00020.html
https://security.gentoo.org/glsa/201806-07
https://twitter.com/taviso/status/951526615145566208

Get alerted when CVE-2018-5702 or the next vulnerability affects your stack