CVE-2020-23321
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in...
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- Record
CVE-2020-23321- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- Record
CVE-2020-23321- Updated
- 2026-11-02
EUVDEUVD-2020-16069 No score
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- Record
EUVD-2020-16069- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q6cq-2jc2-cpx5 No score
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in...
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- Record
GHSA-q6cq-2jc2-cpx5- Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0.
- Record
CVE-2020-23321- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2020-23321- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-23321 is a critical vulnerability (CVSS 9.8) in Jerryscript, published June 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.31%, the 70th percentile. No source names a fixed version.