CVE-2020-23321
CVE-2020-23321 is a critical-severity vulnerability in Jerryscript 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-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Jerryscript
- Published:
- Last modified:
Description
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
Frequently asked questions
- What is CVE-2020-23321?
- There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- How severe is CVE-2020-23321?
- CVE-2020-23321 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-2020-23321 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-23321?
- CVE-2020-23321 affects Jerryscript. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-23321?
- 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-2020-23321 published?
- CVE-2020-23321 was published on 2021-06-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:jerryscript:jerryscript:2.2.0:*:*:*:*:*:*:*
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