THREATPORT/VULNERABILITY/CVE-2022-28805
CRITICAL SEVERITY

CVE-2022-28805

Lua vulnerability

CVSS
9.1
EPSS
3.0%
EPSS pct
86th
Exploited
No known
singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.
Affected vendor
Lua
Affected product
Lua
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness type (CWE)
Published
2022-04-08

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to availability.

Its EPSS score of 3.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2022-28805

  • Confirm whether Lua Lua is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2022-28805.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2022-28805

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2022-28805 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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