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CVE-2025-49113

RoundCube Webmail Deserialization of Untrusted Data

9.9 CRITICALActively exploited (CISA KEV)Public exploitEPSS 99.0%
  1. Published2 Jun 2025
  2. Added to CISA KEV20 Feb 2026
  3. Remediation due13 Mar 2026
Actively exploited (CISA KEV)

RoundCube Webmail contains a deserialization of untrusted data vulnerability that allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php.

Added to KEV: 20 Feb 2026Federal remediation due: 13 Mar 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Roundcube Webmail≥ 1.6.0 < 1.6.11 · < 1.5.10
Debian Linux11.0

Remediation

Fixed in
Roundcube Webmail≥ 1.6.11

References

and 3 more references

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Frequently asked

Is CVE-2025-49113 being actively exploited?

Yes. CVE-2025-49113 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 20 Feb 2026.

How severe is CVE-2025-49113?

CVE-2025-49113 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 99.0% probability of exploitation.

Which products are affected by CVE-2025-49113?

Affected products include Roundcube Webmail, Debian Linux.

How do I fix CVE-2025-49113?

Upgrade affected software to a fixed version, for example Roundcube Webmail 1.6.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-49113 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.