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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2023-37580

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.

CVSS 6.1 · MediumBuzz score 55.9KEV listed

Buzz score

Why this CVE is surfacing

Buzz score total 55.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 17.9 · diversity 13.0 · KEV 25.0 · OTX 0.0 · PoC 0.0
Mention score
17.9
5 evidence mentions in the snapshot
Diversity score
13.0
4 sources across 2 categories
KEV score
25.0
Known exploited vulnerability present
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
5 source links · newest first
  • Critical Zimbra Flaw Could Let Crafted Emails Run Malicious Code in User SessionsThe Hacker News

    eaponize such vulnerabilities as far back as December 2021. Last October, a stored XSS flaw in the Classic Web Client ( CVE-2025-27915 , CVSS Score: 5.4) was alleged to have been exploited as a zero-day in attacks targeting the Brazilian military, although Zimbra told The Hacker News at the time that it found no evidence to back it up. Other XSS flaws

    newsthehackernews.comJul 11, 2026, 6:45 AM
  • 20th November – Threat Intelligence ReportCheck Point Research

    For the latest discoveries in cyber research for the week of 20th November, please download our Threat_Intelligence Bulletin. TOP ATTACKS AND BREACHES Russia-affiliated military intelligence group SandWorm is reportedly responsible for an attack against 22 critical infrastructure companies in Denmark. The attacks, most severe in Danish history, have compromised industrial control systems and forced companies […]

    vendorresearch.checkpoint.comNov 20, 2023, 3:16 PM
  • Zimbra zero-day exploited to steal government emails by four groupsSecurity Affairs

    Google TAG revealed that threat actors exploited a Zimbra Collaboration Suite zero-day (CVE-2023-37580) to steal emails from governments. Google Threat Analysis Group (TAG) researchers revealed that a zero-day vulnerability, tracked as CVE-2023-37580 (CVSS score: 6.1), in the Zimbra Collaboration email software was exploited by four different threat actors to steal email data, user credentials, and authentication tokens […]

    newssecurityaffairs.comNov 16, 2023, 8:49 PM
  • Zimbra Zero-Day Exploited to Hack Government EmailsSecurityWeek

    Google says a Zimbra zero-day from earlier this year, CVE-2023-37580, was exploited in several campaigns to hack government emails.

    newswww.securityweek.comNov 16, 2023, 4:00 PM
  • Zimbra Patches Exploited Zero-Day VulnerabilitySecurityWeek

    Zimbra has released patches for a cross-site scripting (XSS) vulnerability that has been exploited in malicious attacks.

    newswww.securityweek.comJul 28, 2023, 11:43 AM

Exploit code

Public exploit repository references

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0 repository references · best confidence N/A · max 0 stars
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Related records

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