7.5

CVE-2020-36564: Improper input validation in github.com/justinas/nosurf

Modified
AliasesGHSA-5x84-q523-vvwrGO-2020-0049
Published 27-12-2022Last modified 11-04-2025

Vulnerability summary

CVE-2020-36564 is a high (CVSS 7.5) Improper Input Validation vulnerability in github.com/justinas/nosurf. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.76%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 27-12-2022
    PublishedVulnerability first disclosed.
  2. 11-04-2025
    Last modifiedVulnerability information updated.

Description

Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered valid.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.76%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.72% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/justinas1 product
  • nosurf< 1.1.1
Github.com/justinas/nosurf1 product
Nosurf_project1 product

3 vendors · 3 products

References

5 links