CVE-2015-8562
HighExploitedPublic exploitJoomla!
Published Dec 16, 2015 · Updated May 6, 2026
Key Facts
Patch immediately- CVE-2015-8562 is a high-severity vulnerability (CVSS 7.5 v2) affecting Joomla\!.
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Dec 16, 2015. Public exploit code is available.
- EPSS estimates a 98% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
98%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-8562 brief as a PDF
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Description
Joomla! 1.5.x, 2.x, and 3.x before 3.4.6 allow remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via the HTTP User-Agent header, as exploited in the wild in December 2015.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Dec 16, 2015 | n/a | Not reported |
| CIRCL KEV | Dec 16, 2015 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
95 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Joomla\!Joomla | 1.5.0, 1.5.1, 1.5.10, 1.5.11, 1.5.12, 1.5.13, 1.5.14, 1.5.15 | n/a |
Timeline
Publicly disclosed
Dec 16, 2015
Added to Industry KEV feed
Dec 16, 2015
Added to CIRCL KEV
Dec 16, 2015
Last updated
May 6, 2026
Weakness Type
- CWE-20 Improper Input Validation
References
- advisoryhttps://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.html
- exploithttp://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.html
- exploithttps://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Joomla!
Affected: Joomla\! versions 1.5.0, 1.5.1, 1.5.10, 1.5.11, 1.5.12, 1.5.13, 1.5.14, 1.5.15. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Dec 16, 2015.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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