Description
httpdbg before 2.2.1 fails to validate URL schemes in recorded HTTP request URLs rendered as clickable links in the web interface. Attackers controlling traffic recorded by httpdbg can supply javascript: scheme URLs that execute malicious scripts in the application origin when clicked, allowing access to captured request and response data including headers and tokens.
References9
- github.com/cle-b/httpdbg
- github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/hooks/recordhttp2.…
- github.com/cle-b/httpdbg/blob/v2.2.0/httpdbg/webapp/static/inde…
- github.com/cle-b/httpdbg/commit/121845b41c19ddaf30b51be0797bc2f…
- github.com/cle-b/httpdbg/issues/220
- github.com/cle-b/httpdbg/pull/222
- github.com/cle-b/httpdbg/releases/tag/v2.2.1
- www.vulncheck.com/advisories/httpdbg-before-2.2.1-stored-cross-…
- github.com/cle-b/httpdbg/issues/220
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 4.0
-
5.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 17 · as of 9 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.