CVE-2025-12758

highpriority · track · 10EPSS 0.005 · 44 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.52% (44th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.

cvss

Technical severity, 0–10. One row per scoring source.

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · report@snyk.ioexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:Psecondary · ENISA EU

v4.07.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · report@snyk.io

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-172USCWE-172USCWE-792USCWE-792US

exploits (1)

Public proof-of-concept and weaponised exploit code.

open-flaw/CVE-2025-12758open-flaw/CVE-2025-12758PoC · poc_in_github

affected products (9)

Products and version ranges known to be affected.

IBM App Connect Enterpriseall versionscert_bundDEcpe:/a:ibm:app_connect_enterprise:-
IBM App Connect Enterprise <12.0.12.21all versionscert_bundDE
IBM App Connect Enterprise <13.0.5.2all versionscert_bundDE
IBM App Connect Enterprise< 12.0.12.21cert_bundDE
IBM App Connect Enterprise< 13.0.5.2cert_bundDE
n/a org.webjars.npm:validator0 → 13.15.22enisa_euvdEU
n/a validator0 → 13.15.22enisa_euvdEU
validator project validator< 13.15.22nvdUScpe:2.3:a:validator_project:validator:*:*:*:*:*:*:*:*
npm validator< 13.15.22osvUSpkg:npm/validator

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2903IBM App Connect Enterprise: Schwachstelle ermöglicht Denial of ServiceDeutsch2025-12-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in IBM App Connect Enterprise ausnutzen, um einen Denial of Service Angriff durchzuführen.
GHSA-vghf-hv5q-vc2gValidator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements2025-11-27ghsa · osvUS
Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2025-11-27modified 2026-10-19

references (14)

External citations — patches, advisories, analysis.

scry

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