CVE-2022-24682

CRITICALNVD 6.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-02-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.1 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 31%CVSS: 6.1Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.1
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
31%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

February 9, 2022

Last Modified

November 4, 2025

Advisory Details (5)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available.
generic Patch Available

Operation EmailThief: Active Exploitation of Zero-day XSS Vulnerability in Zimbra | Volexity

https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/
generic

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
generic Patch Available

Zimbra Releases/8.8.15/P30 - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30
generic🔴 Active Exploitation

Security Center - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Security_Center
generic

Hotfix Available 5 Feb for Zero-day Exploit Vulnerability in Zimbra 8.8.15 - Zimbra : Blog

https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 44× in last 7d / 223× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 447 total refreshes for this CVE.

  1. 2026-07-27 16:14 UTCGHSA enrichment
  2. 2026-07-27 12:25 UTCGHSA enrichment
  3. 2026-07-27 08:36 UTCGHSA enrichment
  4. 2026-07-27 04:46 UTCGHSA enrichment
  5. 2026-07-27 00:57 UTCGHSA enrichment
  6. 2026-07-26 21:08 UTCGHSA enrichment
  7. 2026-07-26 17:19 UTCEG score recompute
  8. 2026-07-26 17:19 UTCGHSA enrichment
  9. 2026-07-26 14:52 UTCEPSS rescore
  10. 2026-07-26 14:52 UTCEPSS rescore
  11. 2026-07-26 13:30 UTCEG score recompute
  12. 2026-07-26 13:30 UTCGHSA enrichment
  13. 2026-07-26 09:40 UTCGHSA enrichment
  14. 2026-07-26 05:51 UTCGHSA enrichment
  15. 2026-07-26 02:02 UTCEG score recompute
  16. 2026-07-26 02:01 UTCGHSA enrichment
  17. 2026-07-25 14:15 UTCEPSS rescore
  18. 2026-07-24 14:15 UTCEPSS rescore
  19. 2026-07-23 02:09 UTCEG score recompute
  20. 2026-07-22 22:49 UTCEG score recompute
  21. 2026-07-22 22:49 UTCGHSA enrichment
  22. 2026-07-22 19:40 UTCCISA KEV update
  23. 2026-07-22 18:58 UTCGHSA enrichment
  24. 2026-07-22 15:10 UTCEG score recompute
  25. 2026-07-22 15:09 UTCGHSA enrichment
Show 75 more
  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-22 11:20 UTCGHSA enrichment
  4. 2026-07-22 07:31 UTCGHSA enrichment
  5. 2026-07-22 03:42 UTCGHSA enrichment
  6. 2026-07-21 23:53 UTCGHSA enrichment
  7. 2026-07-21 17:57 UTCEG score recompute
  8. 2026-07-21 17:57 UTCGHSA enrichment
  9. 2026-07-21 15:22 UTCEPSS rescore
  10. 2026-07-21 15:22 UTCEPSS rescore
  11. 2026-07-21 14:37 UTCCISA KEV update
  12. 2026-07-21 14:08 UTCGHSA enrichment
  13. 2026-07-21 10:19 UTCGHSA enrichment
  14. 2026-07-21 06:29 UTCGHSA enrichment
  15. 2026-07-21 02:39 UTCGHSA enrichment
  16. 2026-07-20 22:48 UTCGHSA enrichment
  17. 2026-07-20 19:00 UTCEG score recompute
  18. 2026-07-20 19:00 UTCGHSA enrichment
  19. 2026-07-20 17:05 UTCEPSS rescore
  20. 2026-07-20 15:11 UTCGHSA enrichment
  21. 2026-07-20 11:22 UTCGHSA enrichment
  22. 2026-07-20 07:33 UTCGHSA enrichment
  23. 2026-07-20 03:43 UTCGHSA enrichment
  24. 2026-07-19 23:53 UTCGHSA enrichment
  25. 2026-07-19 20:05 UTCGHSA enrichment
  26. 2026-07-19 16:14 UTCGHSA enrichment
  27. 2026-07-19 12:17 UTCGHSA enrichment
  28. 2026-07-19 08:29 UTCGHSA enrichment
  29. 2026-07-19 04:40 UTCEG score recompute
  30. 2026-07-19 04:40 UTCGHSA enrichment
  31. 2026-07-19 02:27 UTCEPSS rescore
  32. 2026-07-19 00:51 UTCGHSA enrichment
  33. 2026-07-18 21:02 UTCGHSA enrichment
  34. 2026-07-18 17:13 UTCGHSA enrichment
  35. 2026-07-18 13:24 UTCEG score recompute
  36. 2026-07-18 13:24 UTCGHSA enrichment
  37. 2026-07-18 10:02 UTCEPSS rescore
  38. 2026-07-18 10:02 UTCEPSS rescore
  39. 2026-07-18 09:35 UTCGHSA enrichment
  40. 2026-07-18 05:46 UTCGHSA enrichment
  41. 2026-07-18 01:57 UTCGHSA enrichment
  42. 2026-07-17 22:08 UTCGHSA enrichment
  43. 2026-07-17 18:19 UTCGHSA enrichment
  44. 2026-07-17 14:30 UTCGHSA enrichment
  45. 2026-07-17 10:41 UTCGHSA enrichment
  46. 2026-07-17 06:52 UTCGHSA enrichment
  47. 2026-07-17 02:58 UTCGHSA enrichment
  48. 2026-07-16 23:10 UTCGHSA enrichment
  49. 2026-07-16 19:21 UTCGHSA enrichment
  50. 2026-07-16 17:04 UTCCISA KEV update
  51. 2026-07-16 17:00 UTCEPSS rescore
  52. 2026-07-16 17:00 UTCEPSS rescore
  53. 2026-07-16 15:30 UTCGHSA enrichment
  54. 2026-07-16 11:40 UTCGHSA enrichment
  55. 2026-07-16 07:50 UTCGHSA enrichment
  56. 2026-07-16 04:01 UTCGHSA enrichment
  57. 2026-07-16 00:12 UTCGHSA enrichment
  58. 2026-07-15 20:23 UTCGHSA enrichment
  59. 2026-07-15 16:56 UTCEPSS rescore
  60. 2026-07-15 16:56 UTCEPSS rescore
  61. 2026-07-15 16:49 UTCCISA KEV update
  62. 2026-07-15 16:33 UTCGHSA enrichment
  63. 2026-07-15 15:04 UTCCISA KEV update
  64. 2026-07-15 12:44 UTCGHSA enrichment
  65. 2026-07-15 08:54 UTCGHSA enrichment
  66. 2026-07-15 05:05 UTCGHSA enrichment
  67. 2026-07-15 01:17 UTCGHSA enrichment
  68. 2026-07-14 21:28 UTCGHSA enrichment
  69. 2026-07-14 18:05 UTCCISA KEV update
  70. 2026-07-14 17:39 UTCGHSA enrichment
  71. 2026-07-14 13:50 UTCGHSA enrichment
  72. 2026-07-14 10:01 UTCGHSA enrichment
  73. 2026-07-14 06:12 UTCGHSA enrichment
  74. 2026-07-14 02:22 UTCGHSA enrichment
  75. 2026-07-13 22:33 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2022/CVE-2022-24682.yaml
    First seen Jan 1, 2022

    Zimbra Collaboration Suite < 8.8.15 - Improper Encoding

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2022-24682?
CVE-2022-24682 is a critical vulnerability published on February 9, 2022. 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…
When was CVE-2022-24682 disclosed?
CVE-2022-24682 was first published in the National Vulnerability Database on February 9, 2022, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-24682 actively exploited?
Yes. CISA added CVE-2022-24682 to the Known Exploited Vulnerabilities catalog on February 25, 2022, affecting Synacor Zimbra Collaborate Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2022-24682?
CVE-2022-24682 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2022-24682?
CVE-2022-24682 affects Synacor Zimbra Collaborate Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2022-24682?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-24682, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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