How severe is CVE-2023-25307?

CVE-2023-25307 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-25307?

CVE-2023-25307 affects the following packages: github.com/nothub/mrpack-install (Go). Ecosystems affected: Go.

How do I fix CVE-2023-25307?

Update github.com/nothub/mrpack-install to 0.16.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-25307 is resolved across your whole dependency graph.

How do I detect CVE-2023-25307 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/nothub/mrpack-install, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-25307 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2023-25307 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2023-25307, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-25307?

CVE-2023-25307 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 49th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2023-25307?

CVE-2023-25307 is classified as Path Traversal (CWE-22). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2023-25307 published, and has it been updated?

CVE-2023-25307 was published on June 26, 2023 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹

🐹 Go

Not in CISA KEV

HIGH severity

CVE-2023-25307 — mrpack-install

HIGHFix: nothub/mrpack-install@a1f424b

CVE-2023-25307 is a high-severity (CVSS 8.8) Path Traversal vulnerability in github.com/nothub/mrpack-install. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for github.com/nothub/mrpack-install — see the affected versions and patch details below.

mrpack-install vulnerable to path traversal with dependency

Also known asGHSA-r887-gfxh-m9rrGO-2023-1543

Published

Jun 26, 2023

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-25307.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐹github.com/nothub/mrpack-install

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Importing a malicious .mrpack file can cause path traversal while downloading files. This can lead to scripts or config files being placed or replaced at arbitrary locations, without the user noticing.

Patches

No patches yet.

Workarounds

Avoid importing .mrpack files from untrusted sources.

References

https://docs.modrinth.com/docs/modpacks/format_definition/#files

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/nothub/mrpack-install`	all versions	0.16.3`go get github.com/nothub/mrpack-install@v0.16.3`

Affected Products

1 product · 1 configurations

Application

mrpack-installmrpack-install_project

< 0.16.3

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

nothub mrpack-install <= v0.16.2 is vulnerable to Directory Traversal.

quiltmc.orgNVDJul 2023

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/nothub/mrpack-install, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/nothub/mrpack-install to 0.16.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-25307 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

### Impact Importing a malicious `.mrpack` file can cause path traversal while downloading files. This can lead to scripts or config files being placed or replaced at arbitrary locations, without the user noticing. ### Patches No patches yet. ### Workarounds Avoid importing `.mrpack` files from untrusted sources. ### References https://docs.modrinth.com/docs/modpacks/format_definition/#files