HOMEVULNERABILITIESCVE-2020-6836
CRITICAL

CVE-2020-6836

CWE-94Published: January 11, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

grammar-parser.jison in the hot-formula-parser package before 3.0.1 for Node.js is vulnerable to arbitrary code injection. The package fails to sanitize values passed to the parse function and concatenates them in an eval call. If a value of the formula is taken from user-controlled input, it may allow attackers to run arbitrary commands on the server.

NVD Source

Technical Analysis

CVE-2020-6836 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

hot-formula-parser_project1 product(s)
hot-formula-parser
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/handsontable/formula-parser/commit/396b089738d4bf30eb570a4fe6a188affa95cd5e
PATCHhttps://www.npmjs.com/advisories/1439
PATCHhttps://github.com/handsontable/formula-parser/commit/396b089738d4bf30eb570a4fe6a188affa95cd5e
PATCHhttps://www.npmjs.com/advisories/1439

All References (6)

→
https://blog.truesec.com/2020/01/17/reverse-shell-through-a-node-js-math-parser/
→
https://github.com/handsontable/formula-parser/commit/396b089738d4bf30eb570a4fe6a188affa95cd5ePatch
→
https://www.npmjs.com/advisories/1439Patch · Third Party Advisory
→
https://blog.truesec.com/2020/01/17/reverse-shell-through-a-node-js-math-parser/
→
https://github.com/handsontable/formula-parser/commit/396b089738d4bf30eb570a4fe6a188affa95cd5ePatch
→
https://www.npmjs.com/advisories/1439Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-6836
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-94
CISA KEVNo
Affected1 vendor(s)
PublishedJan 11, 2020

Related CVEs (CWE-94)

CVE-2026-48836
10.0
CVE-2021-29475
10.0
CVE-2018-4031
10.0
CVE-2016-1985
10.0
CVE-2021-23281
10.0
CVE-2023-2583
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-6836 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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