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CVE-2023-37580

Exploited in the wild. In CISA KEV since 2023‑07‑27. Fixed in 8.8.15.

CVSS 3.16.1MediumEPSS percentile99th49% chance in 30 daysCISA KEVListedsince 2023-07-27, due 2023-08-17
No public exploit knownFix8.8.15Upgrade to this build

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Synacor Zimbra Collaboration SuiteAffected: ≥ 8.8.0, < 8.8.15Upgrade to: 8.8.15Stated by: NVD
  • Zimbra Inc. Zimbra Collaboration SuiteAffected: 8.8.15Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free Nuclei and OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

Coverage timeline

1 publisher

  1. Vendor patch released

    ·The Hacker News summary

  2. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th
CISA KEV
CISA KEV

Listed as exploited in the wild since 2023-07-27.

US federal agencies must remediate by 2023-08-17.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

49% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

11 events over 1100 days, from the signal feeds we watch.

  1. EPSS band changehigh → moderateepss band change
  2. OpenVAS check added
  3. EPSS band changecritical → high
  4. Nuclei check added
  5. Patch availablerecord updated
  6. Publishedweakness classified, att&ck mapped

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Scored 6.1 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction RequiredA user must click a link, open a file, or perform some action

Scope

  • Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)

Impact if exploited

  • Confidentiality LowSome restricted information is disclosed, but limited in scope
  • Integrity LowData modification is possible but limited in scope or consequence
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 4 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Zimbra Inc., not every advisory. This one: actively exploited.