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Exploited vulnerability · CISA KEV

Is CVE-2022-24682 exploited? Yes: in CISA KEV since 25 Feb 2022

Gociux · Synacor Zimbra Collaborate Suite (ZCS) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-24682, Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Feb 2022, 16 days after it was published. It is known to be used in ransomware campaigns. It affects Synacor Zimbra Collaborate Suite (ZCS). If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Feb 2022
ransomwareKnownused in campaigns
EPSStop 5%very likely to be exploited
severity6.1CVSS 3.1 · medium
US federal due11 Mar 2022BOD 22-01 deadline

What it is

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability in the Calendar feature that allows an attacker to execute arbitrary code.

VendorSynacor (19 exploited CVEs in KEV)
ProductZimbra Collaborate Suite (ZCS)
VulnerabilitySynacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability
WeaknessCWE-79, CWE-116
Published9 Feb 2022
Added to KEV25 Feb 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Zimbra Collaborate Suite (ZCS) in your asset inventory, including appliances and cloud images. Stack check lists every exploited Synacor CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 9 Feb 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Synacor.

References

Questions

Is CVE-2022-24682 being exploited?

Yes. CISA added CVE-2022-24682 to the Known Exploited Vulnerabilities catalog on 25 Feb 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-24682 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2022-24682?

Apply updates per vendor instructions. Check Synacor's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Zimbra Collaborate Suite (ZCS) and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in February 2022 · Synacor scorecard · act-now radar.

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