GHSA-p2c4-gxp4-j3xp — medium GitHub Advisory (CVE-2021-34801) in npm/valine

Description

Valine is a fast, simple & powerful comment system. Valine 1.4.14 allows remote attackers to cause a denial of service (application outage) by supplying a ua (aka User-Agent) value that only specifies the product and version.

Basic information

Type: reviewed
Severity: medium
Advisory on GitHub: Open advisory ↗
Repository advisory: —
Source code: Browse source ↗
Published (advisory): 2021-06-21 17:11:25 UTC
Updated: 2023-02-01 05:05:58 UTC
GitHub reviewed: 2021-06-17 18:44:36 UTC
NVD published: 2021-06-16 15:15:00 UTC

Score	Percentile
1.05%	77.53%

CVSS Scores

Base score	Version	Severity	Vector
5.3	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L` 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.

Identifiers

Type	Value
GHSA	GHSA-p2c4-gxp4-j3xp ↗
CVE	CVE-2021-34801 ↗

CWEs

CWE id	Name
CWE-94	Improper Control of Generation of Code ('Code Injection')

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	valine	<= 1.4.14	—	—

Denial of service in Valine