CVE-2023-43770

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.637 · 99 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 3 exploits · PoC

Likely / severe?

63.7% (99th) EPSS

CVSS 6.1 · medium

Is it mine?

14 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2024-02-12remediate by 2024-03-04

required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-24

Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.

cvss

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.16.1mediumAV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · ENISA EU

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondaryexploitability 2.8 · impact 2.7

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

ATT&CK techniques

ATT&CK techniques this enables or maps to.

exploits (3)

Public proof-of-concept and weaponised exploit code.

knight0x07/CVE-2023-43770-PoCPoC for Stored XSS (CVE-2023-43770) VulnerabilityPoC · poc_in_github
s3cb0y/CVE-2023-43770-POCA Proof-Of-Concept for the CVE-2023-43770 vulnerability. PoC · poc_in_github
skyllpro/CVE-2021-44026-PoCBug Chain XSS (CVE-2020-35730 and CVE-2023-43770) to SQLi (CVE-2021-44026)PoC · poc_in_github

affected products (14)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
n/a n/a≤ n/aenisa_euvdEU
The RoundCube Team RoundCube Webmail≤ 1.4.14fstec_bduRU
The RoundCube Team RoundCube Webmail1.5.0 → 1.5.4fstec_bduRU
The RoundCube Team RoundCube Webmail1.6.0 → 1.6.3fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
roundcube webmail< 1.4.14nvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube webmail1.5.0 → 1.5.4nvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube webmail1.6.0 → 1.6.3nvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Bitnami roundcube< 1.4.14osvUSpkg:bitnami/roundcube
Bitnami roundcube1.5.0 → 1.5.4osvUSpkg:bitnami/roundcube
Bitnami roundcube1.6.0 → 1.6.3osvUSpkg:bitnami/roundcube

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2425Roundcube: Schwachstelle ermöglicht Cross-Site ScriptingDeutsch2023-09-21csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Roundcube ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.
BIT-roundcube-2023-437702024-03-06vendor · osvUS
Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2023-09-22modified 2026-06-17

related (52,922)

Related entries.

ID	severity	EPSS	exploitable	published
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CVE-2025-68461US	medium6.1OT critical	26.8% (98th)	KEV	2025-12-18
Roundcube Webmail before 1.5.12 and 1.6 before 1.6.12 is prone to a Cross-Site-Scripting (XSS) vulnerability via the animate tag in an SVG document.
CVE-2025-48700US	—OT critical	1.71% (77th)	KEV	2025-06-23
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to exec…
CVE-2025-27915US	—OT critical	4.06% (91st)	KEV	2025-03-12
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+52917 more

references (12)

External citations — patches, advisories, analysis.

scry

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