CVE-2020-6836
CVE-2020-6836 is a critical-severity vulnerability in Hot-formula-parser Project Hot-formula-parser with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (80th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Hot-formula-parser Project Hot-formula-parser
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-6836?
- 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.
- How severe is CVE-2020-6836?
- CVE-2020-6836 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-6836 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-6836?
- CVE-2020-6836 affects Hot-formula-parser Project Hot-formula-parser. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-6836?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-6836 published?
- CVE-2020-6836 was published on 2020-01-11 and last updated on 2026-06-17.
References
- https://blog.truesec.com/2020/01/17/reverse-shell-through-a-node-js-math-parser/
- https://github.com/handsontable/formula-parser/commit/396b089738d4bf30eb570a4fe6a188affa95cd5e
- https://www.npmjs.com/advisories/1439
Affected products (1)
- cpe:2.3:a:hot-formula-parser_project:hot-formula-parser:*:*:*:*:*:node.js:*:*
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