CVE-2023-37261

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenComputers is a Minecraft mod that adds programmable computers and robots to the game. This issue affects every version of OpenComputers with the Internet Card feature enabled; that is, OpenComputers 1.2.0 until 1.8.3 in their most common, default configurations. If the OpenComputers mod is installed as part of a Minecraft server hosted on a popular cloud hosting provider, such as AWS, GCP and Azure, those metadata services' API endpoints are not forbidden (aka "blacklisted") by default. As such, any player can gain access to sensitive information exposed via those metadata servers, potentially allowing them to pivot or privilege escalate into the hosting provider. In addition, IPv6 addresses are not correctly filtered at all, allowing broader access into the local IPv6 network. This can allow a player on a server using an OpenComputers computer to access parts of the private IPv4 address space, as well as the whole IPv6 address space, in order to retrieve sensitive information.

OpenComputers v1.8.3 for Minecraft 1.7.10 and 1.12.2 contains a patch for this issue. Some workarounds are also available. One may disable the Internet Card feature completely. If using OpenComputers 1.3.0 or above, using the allow list (opencomputers.internet.whitelist option) will prohibit connections to any IP addresses and/or domains not listed; or one may add entries to the block list (opencomputers.internet.blacklist option). More information about mitigations is available in the GitHub Security Advisory.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
59(Track*)
EG Risk 59/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
52.3%
KEV
Not listed

Published

July 7, 2023

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Jul 14, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github_commit

commit d13c015357fd (MightyPirates/OpenComputers)

Fix landed in MightyPirates/OpenComputers commit d13c015357fd — awaiting tagged release

https://github.com/MightyPirates/OpenComputers/commit/d13c015357fd6c42e0a1bdd6e1ef9462f0450a15
generic

OpenComputers/src/main/scala/li/cil/oc/Settings.scala at 5b2ba76a4c242b369b9b6ac6196fd04d96580ad0 · MightyPirates/OpenComputers · GitHub

https://github.com/MightyPirates/OpenComputers/blob/5b2ba76a4c242b369b9b6ac6196fd04d96580ad0/src/main/scala/li/cil/oc/Settings.scala#L614-L637
generic

OpenComputers/src/main/resources/application.conf at 5b2ba76a4c242b369b9b6ac6196fd04d96580ad0 · MightyPirates/OpenComputers · GitHub

https://github.com/MightyPirates/OpenComputers/blob/5b2ba76a4c242b369b9b6ac6196fd04d96580ad0/src/main/resources/application.conf#L966-L986
github Patch Available🟡 PoC Available

SSRF to Cloud (AWS, GCP, Azure) Services Metadata Services (IMDS) not Blocked by Default · Advisory · cc-tweaked/CC-Tweaked · GitHub

https://github.com/cc-tweaked/CC-Tweaked/security/advisories/GHSA-7p4w-mv69-2wm2
github Patch Available

SSRF to cloud (AWS, GCP, Azure) service metadata services (IMDS) and local IPv6 addresses not blocked by default · Advisory · MightyPirates/OpenComputers · GitHub

https://github.com/MightyPirates/OpenComputers/security/advisories/GHSA-vvfj-xh7c-j2cm
generic

[Real world security] Http connections possible to local server network · Issue #2365 · MightyPirates/OpenComputers · GitHub

https://github.com/MightyPirates/OpenComputers/issues/2365

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 53× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2023-37261?
CVE-2023-37261 is a critical vulnerability published on July 7, 2023. OpenComputers is a Minecraft mod that adds programmable computers and robots to the game. This issue affects every version of OpenComputers with the Internet Card feature enabled; that is, OpenComputers 1.2.0 until 1.8.3 in their most common, default configurations. If the OpenComputers mod is…
When was CVE-2023-37261 disclosed?
CVE-2023-37261 was first published in the National Vulnerability Database on July 7, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-37261 actively exploited?
CVE-2023-37261 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-37261?
CVE-2023-37261 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2023-37261?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-37261, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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