CVE-2025-31510Network attack vector

Unauthenticated script injection via unchecked tab parameter

Published Jan 16, 2026 · Updated Jan 16, 2026

Cross-site scripting in affected LemonLDAP::NG portal releases before 2.21.0 allows remote attackers to inject web content through the tab parameter. Main::Display copies the request's tab value into DISPLAY_TAB without verifying that it matches a key in the Choice authentication loop, so the login template reflects attacker-controlled markup. Reachability requires Choice authentication; injected HTML, iframes, or JavaScript render in the login page, while CSP settings determine whether script execution succeeds.

CVSS severity7.2
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in affected LemonLDAP::NG portal releases before 2.21.0 allows remote attackers to inject web content through the tab parameter. Main::Display copies the request's tab value into DISPLAY_TAB without verifying that it matches a key in the Choice authentication loop, so the login template reflects attacker-controlled markup. Reachability requires Choice authentication; injected HTML, iframes, or JavaScript render in the login page, while CSP settings determine whether script execution succeeds.

The record

CVE
CVE-2025-31510
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
LemonLDAP::NG
Product
LemonLDAP::NG
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2026Record 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=2.0.8 <2.16.5
  2. Affected versionversion=2.17.0 <2.21.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LemonLDAP::NG · LemonLDAP::NGversion=2.0.8 <2.16.5; version=2.17.0 <2.21.0

Published CVSS scores

7.2MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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