CVE-2025-54313: Prettier eslint-config-prettier Embedded Malicious Code Vulnerability

61

High

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Jan 22, 2026 Proofs of concept on GitHub · 2

How the score was calculated

Confirmed exploitation (CISA KEV)+35
Public exploit/PoC (github)+6
EPSS 4.9% (30-day exploitation probability)+14
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Confirmed

CISA KEV, listed Jan 22, 2026

EPSS FIRST

4.93%

ahead of 92% of scored CVEs · Oct 14, 2026

Affects

Alexghr

Got-fetch and 7 more

CVSS base

7.5

High · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Active

none · proof-of-concept · active

Automatable

No

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Npm Eslint-config-prettier: fixed in version 8.10.2 — github.com (GitHub Security Advisories)
Npm Eslint-config-prettier: fixed in version 9.1.2 — github.com (GitHub Security Advisories)
Npm Eslint-config-prettier: fixed in version 10.1.8 — github.com (GitHub Security Advisories)
Npm Eslint-plugin-prettier: fixed in version 4.2.4 — github.com (GitHub Security Advisories)
Npm Synckit: fixed in version 0.11.10 — github.com (GitHub Security Advisories)
Npm @pkgr/core: fixed in version 0.2.9 — github.com (GitHub Security Advisories)
Npm Napi-postinstall: fixed in version 0.3.2 — github.com (GitHub Security Advisories)
Npm Got-fetch: fixed in version 6.0.0 — github.com (GitHub Security Advisories)

CISA required action CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

US federal deadline: Feb 12, 2026 — passed 245 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Alexghr Got-fetch, Homarr Homarr, Prettier Eslint-config-prettier…).
Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
Apply the fixed version or the patch documented under Remediation.
EPSS ahead of 92% of scored CVEs: prioritize it in the patch queue.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Alexghr	Got-fetch	version 5.1.1version 5.1.2	Vulnerable	NIST National Vulnerability Database
Homarr	Homarr	≥ 1.29.0 and < 1.30.0	Vulnerable	NIST National Vulnerability Database
Prettier	Eslint-config-prettier	version 9.1.1version 10.1.6version 10.1.7version 8.10.1	Vulnerable	CVE Program (cve.org) e CISA ADP
Prettier	Eslint-config-prettier	version 8.10.1version 9.1.1version 10.1.6version 10.1.7	Vulnerable	NIST National Vulnerability Database
Prettier	Eslint-plugin-prettier	version 4.2.2version 4.2.3	Vulnerable	NIST National Vulnerability Database
Un-ts	Napi-postinstall	version 0.3.1	Vulnerable	NIST National Vulnerability Database
Un-ts	Pkgr/core	version 0.2.8	Vulnerable	NIST National Vulnerability Database
Un-ts	Synckit	version 0.11.9	Vulnerable	NIST National Vulnerability Database
Npm	@pkgr/core	version 0.2.8	Vulnerable	GitHub Security Advisories
Npm	Eslint-config-prettier	version 8.10.1version 9.1.1≥ 10.1.6 and ≤ 10.1.7	Vulnerable	GitHub Security Advisories
Npm	Eslint-plugin-prettier	≥ 4.2.2 and ≤ 4.2.3	Vulnerable	GitHub Security Advisories
Npm	Got-fetch	≥ 5.1.11 and ≤ 5.1.12	Vulnerable	GitHub Security Advisories
Npm	Napi-postinstall	version 0.3.1	Vulnerable	GitHub Security Advisories
Npm	Synckit	version 0.11.9	Vulnerable	GitHub Security Advisories

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.5	CVSS 3.1	High	2.2	4.7	cve@mitre.org via NIST National Vulnerability Database
7.5	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories
7.5	CVSS 3.1	High	—	—	mitre via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N (score shown at the top: cve@mitre.org)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-506

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed

Jan 22, 2026

Federal deadline

Feb 12, 2026

passed 245 day(s) ago

Ransomware use

Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Proofs of concept on GitHub

Checks projects for compromised packages, suspicious files, and import statements. ★ 0 Jul 26, 2025
Detect CVE-2025-54313 eslint-config-prettier supply chain attack IOCs on Windows ★ 0 Jul 26, 2025

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 12, 2026 → Oct 14, 2026 · 3 reading(s) · max 4.93%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Hunt retroactively in logs from before Jan 22, 2026 (KEV listing): exploitation may have started earlier.

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Fix documented
Oct 13, 2026 · GitHub Security Advisories
Affected products added · npm/eslint-config-prettier, npm/eslint-plugin-prettier, npm/synckit, npm/@pkgr/core, npm/napi-postinstall, npm/got-fetch
Oct 13, 2026 · GitHub Security Advisories
Affected products added · prettier/eslint-config-prettier, prettier/eslint-plugin-prettier, un-ts/synckit, un-ts/pkgr/core, alexghr/got-fetch, un-
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · Published → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record published
Oct 13, 2026
Affected products added · prettier/eslint-config-prettier
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
CVSS changed · 7.5
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Published
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Added to CISA KEV (detected)
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
Record created in this database
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
Added to CISA KEV catalog
Jan 21, 2026 · CISA
2025
CVE published
Jul 19, 2025 · mitre

Source activity

Repeated readings are counted rather than listed.

3× References added · Oct 13, 2026 – Oct 13, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

20 on the record

www.cisa.gov/known-exploited-vulnerabilities-catalog
US Government Resource, NIST National Vulnerability Database
news.ycombinator.com/item
Issue Tracking, CVE Program (cve.org) e CISA ADP
news.ycombinator.com/item
Issue Tracking, CVE Program (cve.org) e CISA ADP
github.com/prettier/eslint-config-prettier/commit/9b0b0a47ec28a7a83cf65e8436a877
GitHub Security Advisories
github.com/community-scripts/ProxmoxVE/discussions/6115
Third Party Advisory, NIST National Vulnerability Database
socket.dev/blog/npm-phishing-campaign-leads-to-prettier-tooling-packages-comprom
Third Party Advisory, CVE Program (cve.org) e CISA ADP
github.com/un-ts/pkgr/commit/e1420c99e44d8a2ae949381f9fbe1af5ba9cb1dd
GitHub Security Advisories
secure.software/npm/packages/got-fetch
GitHub Security Advisories
www.stepsecurity.io/blog/supply-chain-security-alert-eslint-config-prettier-package-shows
Exploit, Third Party Advisory, CVE Program (cve.org) e CISA ADP
github.com/un-ts/synckit/commit/8f2ee32d4f75736a1c8d7e1101190a71e48909e4
GitHub Security Advisories
www.bleepingcomputer.com/news/security/popular-npm-linter-packages-hijacked-via-phishing-to-dr
Exploit, Third Party Advisory, CVE Program (cve.org) e CISA ADP
github.com/prettier/eslint-config-prettier/issues/339
Issue Tracking, CVE Program (cve.org) e CISA ADP
github.com/prettier/eslint-plugin-prettier/commit/ec39dd4400f10c52d10cd991c10fa8
GitHub Security Advisories
github.com/un-ts/napi-postinstall/commit/38b4e95cf554e2549b9e1e2c4ff6bff4da9a65f
GitHub Security Advisories
www.endorlabs.com/learn/cve-2025-54313-eslint-config-prettier-compromise----high-severi
Third Party Advisory, NIST National Vulnerability Database
www.bleepingcomputer.com/news/security/popular-npm-linter-packages-hijacked-via-phishing-to-dr
GitHub Security Advisories
www.npmjs.com/package/eslint-config-prettier
Product, CVE Program (cve.org) e CISA ADP
nvd.nist.gov/vuln/detail/CVE-2025-54313
GitHub Security Advisories
checkmarx.com/zero-post/supply-chain-phishing-campaign-drops-more-malware-into-npm-
GitHub Security Advisories
github.com/advisories/GHSA-f29h-pxvx-f335
GitHub Security Advisories

Elsewhere on this site

Alexghr
every CVE for this vendor

2026-01
what else CISA listed that month

CWE-506
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-32602 Homarr has a Race Condition in Invite Token Registration (TOCTOU) Apr 6, 2026
High CVE-2026-33510 DOM-Based XSS in Homarr /auth/login Redirect Apr 6, 2026
High CVE-2026-27796 Homarr: Unauthenticated Information Disclosure (Integration Metadata Leak) Mar 7, 2026
Medium CVE-2026-27797 Homarr: Unauthenticated SSRF in rssFeed.ts Mar 7, 2026
Medium CVE-2026-25123 Homarr affected by Unauthenticated SSRF / Port-Scan Primitive via widget.app.ping Feb 6, 2026
Critical CVE-2025-67493 Homarr: missing input sanitization and possible privilege escalation through ldap search query injection Dec 17, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-54313 is "Prettier eslint-config-prettier Embedded Malicious Code Vulnerability", rated High. It affects Got-fetch (Alexghr); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 7.5 describes technical severity. EPSS 4.93% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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