CVE-2018-25074Network attack vector

Service interruption via backtracking-prone URI validation

Published Jan 11, 2023 · Updated Nov 25, 2024

Inefficient regular expression evaluation in Prestaul skeemas before 1.2.5 allows remote attackers to interrupt service via a crafted URI. The uri format validator in validators/base.js used a repeated path subexpression that could match empty input, causing excessive backtracking on crafted strings. Reachability requires a consuming application to pass attacker-controlled data through string validation with format set to uri; the bounded consequence is CPU exhaustion and service interruption.

CVSS severity7.5
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inefficient regular expression evaluation in Prestaul skeemas before 1.2.5 allows remote attackers to interrupt service via a crafted URI. The uri format validator in validators/base.js used a repeated path subexpression that could match empty input, causing excessive backtracking on crafted strings. Reachability requires a consuming application to pass attacker-controlled data through string validation with format set to uri; the bounded consequence is CPU exhaustion and service interruption.

The record

CVE
CVE-2018-25074
Published
Jan 11, 2023
Updated
Nov 25, 2024
Vendor
Prestaul
Product
skeemas
Classifications
CWE-1333, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Prestaul · skeemasversion=n/a

Published CVSS scores

3.5VulDBCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.5VulDBCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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