CVE-2025-43880Network attack vector

Service interruption via deep-path regex backtracking

Published Jun 25, 2025 · Updated Jun 25, 2025

Regular expression denial of service in GROWI before 7.1.6 allows remote authenticated users to interrupt service via a deep page path. The restrictedPatternsToCreate path check evaluates a nested-quantifier expression against an attacker-controlled page path, causing excessive backtracking. Any logged-in user who can create a page through the page tree or a permalink can consume server processing time; no data-read or data-write impact is reported.

CVSS severity4.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in GROWI before 7.1.6 allows remote authenticated users to interrupt service via a deep page path. The restrictedPatternsToCreate path check evaluates a nested-quantifier expression against an attacker-controlled page path, causing excessive backtracking. Any logged-in user who can create a page through the page tree or a permalink can consume server processing time; no data-read or data-write impact is reported.

The record

CVE
CVE-2025-43880
Published
Jun 25, 2025
Updated
Jun 25, 2025
Vendor
WESEEK, Inc.
Product
GROWI
Classifications
CWE-1333, T1499.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=prior to v7.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WESEEK, Inc. · GROWIversion=prior to v7.1.6

Published CVSS scores

5.3JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
4.3JPCERT/CCCVSS:3.0/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.002Service Exhaustion

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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