CVE-2020-36564 json
Improper input validation in github.com/justinas/nosurf
published 5y ago modified 4mo ago also GHSA-5x84-q523-vvwr , GO-2020-0049 , EUVD-2022-7521
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/justinas/nosurf 1.1.1
- github.com/justinas/nosurf github.com/justinas/nosurf 1.1.1
- github.com/justinas/nosurf@4d86df7 commit
- github.com/justinas/nosurf#60 pull request
Is CVE-2020-36564 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/justinas/nosurf | <1.1.1 |
1.1.1 |
Affected products
- github.com/justinas/nosurf github.com/justinas/nosurf
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/justinas/nosurf/pull/60
web, patch, third-party-advisory
-
github.com
/justinas/nosurf/commit/4d86df7a4affa1fa50ab39fb09aac56c3ce9c314
web, patch, third-party-advisory
-
pkg.go.dev
/vuln/GO-2020-0049
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-36564
advisory
-
github.com
/justinas/nosurf
package
Sources
- CVE List CVE-2020-36564
- GitHub Advisory GHSA-5x84-q523-vvwr
- NVD CVE-2020-36564
- OSV GO-2020-0049
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.