Security readout for executives and security teams
Plain-English summary
This issue affects Tiki CMS/Groupware 8.2 and earlier. A remote user with administrator rights could send crafted regex-related input that makes the server run arbitrary PHP. That can turn an admin account compromise or malicious admin into full application or server compromise. The sources do not show KEV listing or active exploitation.
Executive priority
Prioritize if Tiki 8.2 or earlier is present, because administrator-level code execution can compromise the web application and potentially the host. Urgency is lower where no affected Tiki deployment exists or admin access is tightly restricted.
Technical view
CVE-2011-4558 is a PHP code injection issue in Tiki 8.2 and earlier involving the regexres and regex parameters. The CVE record says remote administrators can execute arbitrary PHP code. No CVSS, CWE, patch version, or detailed remediation data is present in the supplied bundle.
Likely exposure
Exposure is limited to organizations still running Tiki 8.2 or earlier, especially internet-facing instances with administrator access paths. The attacker must already have remote administrator privileges according to the CVE description.
Exploitation context
The bundle includes a Packet Storm advisory reference, indicating public technical discussion existed. KEV is false, and the supplied sources do not support a claim of active exploitation in the wild.
Researcher notes
The key constraint is authentication: the CVE states remote administrators, not unauthenticated attackers. The supplied data lacks CVSS, CWE, affected CPEs, and patch details, so validation should focus on version confirmation, admin exposure, and vendor remediation guidance.
Mitigation direction
- Inventory Tiki CMS/Groupware instances and identify any version 8.2 or earlier.
- Check current Tiki vendor guidance for the fixed version or recommended upgrade path.
- Restrict administrative access to trusted networks or VPN where possible.
- Review administrator accounts, remove stale users, and enforce strong authentication controls.
- Treat outdated internet-facing Tiki installations as upgrade priorities.
Validation and detection
- Confirm the exact Tiki version from application administration or deployment records.
- Identify whether administrative interfaces are reachable from the internet.
- Review recent administrator account activity for unexpected changes or logins.
- Check web and application logs for unusual requests to regex-related administrative parameters.
- Verify remediation against vendor documentation after upgrade or configuration changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2011-4558 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://packetstormsecurity.com/files/108111/Tiki-Wiki-CMS-Groupware-8.2-Code-Injection.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.