Threats / Roundcube / CVE-2024-37383
CVE-2024-37383
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Roundcube Webmail vulnerability
Roundcube Webmail contains a cross-site scripting vulnerability in SVG animate attribute handling that allows remote attackers to execute malicious JavaScript.
Verdict
Today item — known-exploited.
A reflected or stored XSS flaw in SVG animation processing enables unauthenticated attackers to inject and execute arbitrary scripts in user browsers, compromising webmail sessions and user data.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
4 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-10-24).
Probability (EPSS)
EPSS 0.73296 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Roundcube, Webmail. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-79 Cross-site Scripting (XSS) — weakness family: Web / client.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious SVG with animate attributes containing JavaScript payloads.
Business
Webmail users are exposed to account compromise and credential theft through script execution in their browsers.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I deliver the payload via email or web link, triggering script execution when the victim views the message.
Business
Session hijacking and unauthorized access to email accounts result in data exfiltration and reputational damage.
3
Lateral reach — past segmentation narrative 3
Attacker
I harvest session tokens or inject keyloggers to monitor user activity and communications.
Business
Confidentiality and integrity of email communications are compromised, affecting all users relying on the webmail service.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05