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Fencer Vulns
high 7.5

CVE-2020-13991 json

vm/opcodes.c in JerryScript 2.2.0 allows attackers to hijack the flow of control by controlling a register.

published 2020-09-24 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6161

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

vm/opcodes.c in JerryScript 2.2.0 allows attackers to hijack the flow of control by controlling a register.

Patch / fix

Exploit prediction

2.44% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/jerryscript-project/jerryscript/pull/3867 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/jerryscript-project/jerryscript/issues/3860 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/jerryscript-project/jerryscript/issues/3859 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/jerryscript-project/jerryscript/issues/3858 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.