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CVE
CVE-2018-16153
An issue was discovered in Apereo Opencast 4.x through 10.x before 10.6. It sends system digest credentials during authe
An issue was discovered in Apereo Opencast 4.x through 10.x before 10.6. It sends system digest credentials during authentication attempts to arbitrary external services in some situations.
HIGH · CVSS 7.5
EPSS 0.00829
EPSS exploitation odds0.83% · top 47%
Schedule remediation
- SSVC automatable: yes - attacks can be scripted at scale
- CVSS base score ≥ 7.0
No Sigma yet — build one →
YARA rules0
Look this up elsewhere - one-click external pivots
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How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2018-16153, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked.
EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal.
CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score.
Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits.
PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
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Exploitation momentum
459 days of EPSSdormant
Flat and low - no real exploitation pressure. This reads the direction and speed of EPSS over time, which can move before EPSS itself peaks or before CISA lists it.
EPSS exploitation probability
0.83%
Top 47%odds of exploitation in the next 30 days
CVSS metric silhouette
shape grows toward worst-case
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Tech impact
partial
CVSS vector breakdown
Exploitability - how they get in
Attack Vector
Network
Adjacent
Local
Physical
Attack Complexity
Low
High
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Impact - what breaks
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NLifecycle
- 12 Dec 2023Published to NVD
- 17 Jun 2026Last modified
Every entry is a recorded date - NVD publish/modify, CISA KEV add, public exploit disclosure. No inferred events.
Attack path
Full kill chain
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ATT&CK techniques
1Techniques this CVE enables. Pills with a solid outline are high confidence - named directly in ATT&CK or Nuclei, or human-curated by CTID; the rest are inferred from the weakness type using MITRE's CVE Mapping Methodology and the CWE → CAPEC chain. Broad, generic-weakness guesses are filtered out. A small N× marks a technique that N independent sources agree on.
▤ Build a SIEM detection for these techniques▤
CAPEC attack patterns
12Attack patterns this CVE enables - the bridge from weakness to ATT&CK technique.
CAPEC-CAPEC-102 · Session Sidejacking CAPEC-CAPEC-474 · Signature Spoofing by Key Theft CAPEC-CAPEC-50 · Password Recovery Exploitation CAPEC-CAPEC-509 · Kerberoasting CAPEC-CAPEC-551 · Modify Existing Service CAPEC-CAPEC-555 · Remote Services with Stolen Credentials CAPEC-CAPEC-560 · Use of Known Domain Credentials CAPEC-CAPEC-561 · Windows Admin Shares with Stolen Credentials CAPEC-CAPEC-600 · Credential Stuffing CAPEC-CAPEC-644 · Use of Captured Hashes (Pass The Hash) CAPEC-CAPEC-645 · Use of Captured Tickets (Pass The Ticket) CAPEC-CAPEC-652 · Use of Known Kerberos Credentials
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Weakness Classification
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Affected Products & Versions
1apereo opencast>= 4.0 and < 10.6
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Affected Packages
1Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven
org.opencastproject:opencast-common
HIGH
fixed in 10.6
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Related CVEs
8CVEs linked to this one by a shared weakness (CWE) or affected product - joins on data already in the engine, with the reason shown per row.
CVE-1999-0013
Stolen credentials from SSH clients via ssh-agent program, allowing other local ...
same CWE-522
HIGH
CVE-2000-0944
CGI Script Center News Update 1.1 does not properly validate the original news a...
1
same CWE-522
CRITICAL
CVE-2005-3435
admin_news.php in Archilles Newsworld up to 1.3.0 allows attackers to bypass aut...
same CWE-522
CRITICAL
CVE-2007-0681
profile.php in ExtCalendar 2 and earlier allows remote attackers to change the p...
1
same CWE-522
CRITICAL
CVE-2017-1000221
In Opencast 2.2.3 and older if user names overlap, the Opencast search service u...
same product
MEDIUM
CVE-2020-5228
Opencast before 8.1 and 7.6 allows unauthorized public access to all media and m...
same product
HIGH
CVE-2020-5229
Opencast before 8.1 stores passwords using the rather outdated and cryptographic...
same product
HIGH
CVE-2020-5222
Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created...
same product
MEDIUM
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References & Sources
4Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.