Page generated: 11 Nov 2026, 09:54 UTC
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CVE-2022-24682

An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes …

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An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.
CVSS 6.1 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.1/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 6.1: +0.91
  • Fresh EPSS: 30.93%: +0.15

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

Sources: 6 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

BleepingComputer
Press · 17 Nov 2023, 08:00 · Google: Hackers exploited Zimbra zero-day in attacks on govt orgs - BleepingComputer
The Record from Recorded Future News
Press · 16 Nov 2023, 08:00 · Hackers target Greece, Tunisia, Moldova, Vietnam and Pakistan with Zimbra zero-day - The Record from Recorded Future News
blog.google
Press · 16 Nov 2023, 08:00 · Zimbra 0-day used to target international government organizations - blog.google
WeLiveSecurity
Press · 17 Aug 2023, 07:00 · Mass-spreading campaign targeting Zimbra users - WeLiveSecurity
Recorded Future
Press · 08 Aug 2023, 07:00 · RedHotel: A Prolific, Chinese State-Sponsored Group Operating at a Global Scale - Recorded Future
See all 6 source documents
TechTarget
Press · 17 Aug 2022, 07:00 · CISA: Threat actors exploiting multiple Zimbra flaws - TechTarget

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 8.1 (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 30.9%
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 13:58:36.128549+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
09 Feb 2022, 03:19
Added to the CISA KEV catalog
25 Feb 2022, 00:00
First press mention
17 Aug 2022, 07:00
Latest press mention
17 Nov 2023, 08:00
Score calculated
05 Nov 2026, 13:58