Page generated: 08 Nov 2026, 15:03 UTC
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CVE-2024-42009

A Cross-Site Scripting vulnerability in Roundcube through 1.5.7 and 1.6.x through 1.6.7 allows a remote attacker to steal and send emails of a victim via a crafted e-mail message that abuses a Desanitization issue in message_body() in program/actions/mail/show.php.

CVSS 9.3 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.8/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.3: +1.40
  • Fresh EPSS: 82.88%: +0.41

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Proofpoint
Press · 23 Jul 2026, 07:00 · Operation RoundPress Rolls on with More Half-Click Webmail Zero-Days from TA458 - Proofpoint
BleepingComputer
Press · 08 Jul 2026, 07:00 · Hackers exploit Roundcube flaw to spy on academic researchers - BleepingComputer
The Hacker News
Press · 07 Jul 2026, 07:00 · Suspected China-Aligned Hackers Exploit Roundcube Flaws Against Universities - The Hacker News
The Hacker News
Press · 14 May 2026, 07:00 · Ghostwriter Targets Ukrainian Government With Geofenced PDF Phishing, Cobalt Strike - The Hacker News
SC Media
Press · 10 Jun 2025, 07:00 · Updated CISA vulnerabilities catalog adds critical Erlang/OTP SSH, Roundcube issues - SC Media
See all 12 source documents
SecurityWeek
Press · 10 Jun 2025, 07:00 · Exploited Vulnerability Impacts Over 80,000 Roundcube Servers - SecurityWeek
Dark Reading
Press · 10 Jun 2025, 07:00 · PoC Code Escalates Roundcube Vuln Threat - Dark Reading
CERT Polska
Press · 05 Jun 2025, 07:00 · UNC1151 exploiting Roundcube to steal user credentials in a spearphishing campaign - CERT Polska
CERT-FR
Technical advisory · 09 Aug 2024, 00:00 · Multiples vulnérabilités dans Roundcube (09 août 2024)
CERT-FR
Press · 09 Aug 2024, 00:00 · Multiples vulnérabilités dans Roundcube (09 août 2024)
The Hacker News
Press · 07 Aug 2024, 07:00 · Roundcube Webmail Flaws Allow Hackers to Steal Emails and Passwords - The Hacker News
Help Net Security
Press · 07 Aug 2024, 07:00 · Roundcube flaws allow easy email account compromise (CVE-2024-42009, CVE-2024-42008) - Help Net Security

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.8 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

See 2 repos with metrics
RepositoryStarsForksLanguageUpdated
DaniTheHack3r/CVE-2024-42009-PoC81Python30 May 2025, 00:21
Bhanunamikaze/CVE-2024-4200910Python03 Mar 2025, 20:13
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.3; EPSS 82.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:16.850043+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
05 Aug 2024, 00:00
First press mention
07 Aug 2024, 07:00
Added to the CISA KEV catalog
09 Jun 2025, 00:00
Latest press mention
23 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:59
PoCs on GitHub
2 repositories