CVE-2021-44026

Exp

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params.

Published: 2021-11-19 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44026 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 72.53%, 99th percentile). CISA KEV confirms active exploitation (added 2023-06-22) affecting Roundcube / Roundcube Webmail. SQL injection (CWE-89) Unauthenticated remote administrative access may be possible. EPSS rose +8.49% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2021-44026

Name: Roundcube Webmail SQL Injection Vulnerability · CISA KEV detail

Exploit added: 2023-06-22

Action due: 2023-07-13

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2021-44026

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-18 64.04% 72.53% +8.49%
2 2025-12-28 63.71% 64.04% +0.33%
3 2025-12-27 — 63.71% —

Full EPSS history (53 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44026

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-44026

OS Trackers for CVE-2021-44026

vendor priority summary link
debian not yet assigned CVE-2021-44026 not yet assigned priority: Debian including 1 source packages (roundcube), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-44026
gentoo high CVE-2021-44026: 1 GLSA(s) (202507-10), 1 atom(s) (mail-client/roundcube); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-44026
ubuntu high CVE-2021-44026 high priority: Ubuntu including 1 source packages (roundcube), 14 status rows across 14 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 7, released 4, ignored 2, DNE 1. https://ubuntu.com/security/CVE-2021-44026

Affected software / configurations for CVE-2021-44026

Vendor Product Version Raw CPE
roundcube webmail < 1.3.17 cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube webmail >= 1.4.0, < 1.4.12 cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject fedora 34 cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2021-44026

URL Tags
https://bugs.debian.org/1000156 Mailing List Patch
https://github.com/roundcube/roundcubemail/commit/c8947ecb762d9e89c2091bda28d49002817263f1 Patch
https://github.com/roundcube/roundcubemail/commit/ee809bde2dcaa04857a919397808a7296681dcfa Patch
https://lists.debian.org/debian-lts-announce/2021/12/msg00004.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDVGIZMQJ5IOM47Y3SAAJRN5VPANKTKO/ Mailing List Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TP3Y5RXTUUOUODNG7HFEKWYNIPIT2NL4/ Mailing List Release Notes
https://www.debian.org/security/2021/dsa-5013 Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-44026 US Government Resource
cvelogic Threat Intelligence