Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2025-49113

Webmail Remote Code Execution

Roundcube / Webmail · affected before 1.5.10

Watch CVE-2025-49113 Browse KEV feed
Severity
CVSS 9.9 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
99.0%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-49113 is a vulnerability affecting Roundcube Webmail. Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Roundcube / Webmail affected before 1.5.10.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Webmail Remote Code Execution

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Roundcube Affected
Webmail
Before 1.5.10 Before 1.6.11
Published
02 Jun 2025
Exploitation Reported
01 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
Low
User interaction
None

Tags

cisa nuclei_scanner php

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 01 Jun 2026

A trusted third party reported exploitation.

Proof of concept available

Nuclei Templates

Recorded 12 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CVE First 2026-06-01 11:03 UTC
CISA 2026-06-02 14:03 UTC
The Hacker News 2026-09-25 10:31 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-49113.yaml 01 Jun 2026

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.9 Critical

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

99.0%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Deserialization of Untrusted Data CWE-502

Recent mention · SOCRadar

Operation Talked: A Russia-Linked Cyber Espionage Campaign Targeting Ukraine’s Defense Industry

Operation Talked: A Russia-Linked Cyber Espionage Campaign Targeting Ukraine's Defense Industry TL;DR: OPERATION TALKED is an ongoing Russia-linked espionage campaign, exposed after the actor left their own C2 as an open

Read full advisory

All Mentions

Recent mention · SOCRadar

Operation Talked: A Russia-Linked Cyber Espionage Campaign Targeting Ukraine’s Defense Industry

SOCRadar · 26 Sep 2026

Operation Talked: A Russia-Linked Cyber Espionage Campaign Targeting Ukraine's Defense Industry TL;DR: OPERATION TALKED is an ongoing Russia-linked espionage campaign, exposed after the actor left their own C2 as an open

Recent mention · The Hacker News

Roundcube Pre-Auth SQL Injection Flaw Actively Exploited in the Wild

The Hacker News · 25 Sep 2026

Ravie LakshmananSep 25, 2026Vulnerability / Email Security The Canadian Centre for Cyber Security has warned that a now-patched Roundcube Webmail vulnerability is being actively exploited in the wild. The vulnerability in question is CVE-2026-48842 (CVSS score: 8.1), a pre-authentication SQL injection in the virtuser_query plugin of Roundcube Webmail versions 1.6.x before 1.6.16 and 1.7.x before 1.7.1. The issue stems from a preg_replace() backslash escape bypass that allows attackers to inject arbitrary SQL statements without authentication. "Unauthenticated attackers can inject SQL into...

Recent mention · RecordedFuture

August 2026 CVE Landscape

RecordedFuture · 08 Sep 2026

In August 2026, Insikt Group® identified 73 high-impact vulnerabilities that should be prioritized for remediation, 43 of which had a Very Critical Recorded Future Risk Score. This represents a 14% decrease from last month.

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Roundcube Webmail - Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 10:31 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  2. 14:21 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 14:03 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  4. 15:34 UTC

    Nuclei template available

    Scanner coverage available

  5. 11:03 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  6. 00:00 UTC

    CVE published

    Vulnerability disclosed publicly

  7. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-49113

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2025-49113",
  "confidence": "Confirmed",
  "cvss_score": 9.9,
  "cvss_estimated": false,
  "epss_score": 0.98972,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}