CVE-2022-29970

Sinatra before 2.2.0 does not validate that the expanded path matches public_dir when serving static files.

Published: 2022-05-02 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-29970 is rated Moderate Risk (54.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.60%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-29970

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-17 0.65% 0.60% -0.05%
2 2025-12-18 0.53% 0.65% +0.12%
3 2025-11-21 — 0.53% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-29970

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2022-29970

GitHub Security Advisory for CVE-2022-29970

GHSA-qp49-3pvw-x4m5 · Severity: high · Ecosystem: rubygems — sinatra does not validate expanded path matches

OS Trackers for CVE-2022-29970

vendor priority summary link
debian not yet assigned CVE-2022-29970 not yet assigned priority: Debian including 1 source packages (ruby-sinatra), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-29970
redhat high — https://access.redhat.com/security/cve/CVE-2022-29970
suse high CVE-2022-29970 severity important: SUSE including 64 source package names (ardana-barbican-9.0+git.1644879908.8a641c1-3.13.1, grafana-6.7.4-3.26.1, …), 104 product×package rows across 5 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9, … (5 product lines)): Fixed 104. https://www.suse.com/security/cve/CVE-2022-29970/
ubuntu medium CVE-2022-29970 medium priority: Ubuntu including 1 source packages (ruby-sinatra), 12 status rows across 12 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, upstream, xenial): not-affected 6, released 4, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2022-29970

Affected software / configurations for CVE-2022-29970

Vendor Product Version Raw CPE
sinatrarb sinatra < 2.2.0 cpe:2.3:a:sinatrarb:sinatra:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2022-29970

cvelogic Threat Intelligence