How severe is CVE-2020-29203?

CVE-2020-29203 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-2020-29203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29203?

CVE-2020-29203 affects Struct2json Project Struct2json. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29203?

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-2020-29203 published?

CVE-2020-29203 was published on 2020-12-26 and last updated on 2026-06-17.

CVE-2020-29203

CVE-2020-29203 is a critical-severity vulnerability in Struct2json Project Struct2json 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Struct2json Project Struct2json
Published: 2020-12-26
Last modified: 2026-06-17

Description

struct2json before 2020-11-18 is affected by a Buffer Overflow because strcpy is used for S2J_STRUCT_GET_string_ELEMENT.

Frequently asked questions

What is CVE-2020-29203?: struct2json before 2020-11-18 is affected by a Buffer Overflow because strcpy is used for S2J_STRUCT_GET_string_ELEMENT.
How severe is CVE-2020-29203?: CVE-2020-29203 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-2020-29203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29203?: CVE-2020-29203 affects Struct2json Project Struct2json. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29203?: 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-2020-29203 published?: CVE-2020-29203 was published on 2020-12-26 and last updated on 2026-06-17.

References

https://github.com/armink/struct2json/issues/13

Affected products (1)

cpe:2.3:a:struct2json_project:struct2json:*:*:*:*:*:*:*:*

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