Page generated: 11 Nov 2026, 04:29 UTC
CVE-2023-37580
Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
CVSS 6.1 (MEDIUM) KEV: KNOWN CATALOG
Attention and evidence
HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.2/10
General review priority; not probability
Evidence confidence: Exploitation recorded
Sources: 9 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
The Hacker News
Press · 11 Jul 2026, 07:00 · Critical Zimbra Flaw Could Let Crafted Emails Run Malicious Code in User Sessions - The Hacker News
The Cyber Express
Press · 10 Oct 2024, 17:30 · Russian SVR Exploiting Unpatched Vulnerabilities - The Cyber Express
Check Point Research
Press · 20 Nov 2023, 08:00 · 20th November – Threat Intelligence Report - Check Point Research
The Times of India
Press · 17 Nov 2023, 08:00 · Google identifies hacking attack on government of Pakistan and these countries - The Times of India
BleepingComputer
Press · 17 Nov 2023, 08:00 · Google: Hackers exploited Zimbra zero-day in attacks on govt orgs - BleepingComputer
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 8.2 (2026-11-02 15:13). The curve appears once the score changes.
Public exploit evidence
0
Public exploit entries / repo candidates
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 6.1; EPSS 49.1%
- 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 13:58:56.083638+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z
Source event timeline
First press mention
14 Jul 2023, 07:00
Added to the CISA KEV catalog
27 Jul 2023, 00:00
Published
31 Jul 2023, 00:00
Latest press mention
11 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:58