Reflected XSS vulnerability in dyn_conn.php
An XSS vulnerability in dyn_conn.php can be used by an unauthenticated remote attacker to trick an authenticated user to send a manipulated POST request to the device in order to change parameters available via web based management (WBM). The vulnerability does not provide access to system-level resources such as operating system internals or privileged functions. Access is limited to device configuration parameters that are available in the context of the web application. The session cookie is secured by the httpOnly Flag. Therefore an attacker is not able to take over the session of an authenticated user.
- Published
- Dec 9, 2025
- Updated
- Sep 30, 2026
- EPSS
- 0.7% · 50th percentile
- CWE
- CWE-79
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · CERTVDE
- 7.1
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| phoenixcontact | fl nat 2008 firmware | cpe:2.3:o:phoenixcontact:fl_nat_2008_firmware |
| phoenixcontact | fl nat 2008 | cpe:2.3:h:phoenixcontact:fl_nat_2008 |
| phoenixcontact | fl nat 2208 firmware | cpe:2.3:o:phoenixcontact:fl_nat_2208_firmware |
| phoenixcontact | fl nat 2208 | cpe:2.3:h:phoenixcontact:fl_nat_2208 |
| phoenixcontact | fl nat 2304-2gc-2sfp firmware | cpe:2.3:o:phoenixcontact:fl_nat_2304-2gc-2sfp_firmware |
| phoenixcontact | fl nat 2304-2gc-2sfp | cpe:2.3:h:phoenixcontact:fl_nat_2304-2gc-2sfp |
| phoenixcontact | fl switch 2005 firmware | cpe:2.3:o:phoenixcontact:fl_switch_2005_firmware |
| phoenixcontact | fl switch 2005 | cpe:2.3:h:phoenixcontact:fl_switch_2005 |
| phoenixcontact | fl switch 2008 firmware | cpe:2.3:o:phoenixcontact:fl_switch_2008_firmware |
| phoenixcontact | fl switch 2008 | cpe:2.3:h:phoenixcontact:fl_switch_2008 |
| phoenixcontact | fl switch 2008f firmware | cpe:2.3:o:phoenixcontact:fl_switch_2008f_firmware |
| phoenixcontact | fl switch 2008f | cpe:2.3:h:phoenixcontact:fl_switch_2008f |
and 125 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- phoenixcontact fl nat 2008 firmwarebefore 3.50
- phoenixcontact fl nat 2208 firmwarebefore 3.50
- phoenixcontact fl nat 2304-2gc-2sfp firmwarebefore 3.50
- phoenixcontact fl switch 2005 firmwarebefore 3.50
- phoenixcontact fl switch 2008 firmwarebefore 3.50
- phoenixcontact fl switch 2008f firmwarebefore 3.50
- phoenixcontact fl switch 2016 firmwarebefore 3.50
- phoenixcontact fl switch 2105 firmwarebefore 3.50
- phoenixcontact fl switch 2108 firmwarebefore 3.50
- phoenixcontact fl switch 2116 firmwarebefore 3.50
- phoenixcontact fl switch 2204-2tc-2sfx firmwarebefore 3.50
- phoenixcontact fl switch 2205 firmwarebefore 3.50
- phoenixcontact fl switch 2206-2fx firmwarebefore 3.50
- phoenixcontact fl switch 2206-2fx sm firmwarebefore 3.50
- phoenixcontact fl switch 2206-2fx sm st firmwarebefore 3.50
- phoenixcontact fl switch 2206-2fx st firmwarebefore 3.50
- phoenixcontact fl switch 2206-2sfx firmwarebefore 3.50
- phoenixcontact fl switch 2206-2sfx pn firmwarebefore 3.50
- phoenixcontact fl switch 2206c-2fx firmwarebefore 3.50
- phoenixcontact fl switch 2207-fx firmwarebefore 3.50
Versions reported by the vendor
Affected version ranges reported by the assigning authority (CERTVDE). Independent of NVD's CPE analysis and usually ahead of it.
Phoenix Contact FL NAT 2008
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL NAT 2208
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL NAT 2304-2GC-2SFP
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2005
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2008
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2008F
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2016
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2105
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2108
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2116
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2204-2TC-2SFX
- 0.0.0 and later · before 3.50affected · semver
Phoenix Contact FL SWITCH 2205
- 0.0.0 and later · before 3.50affected · semver
Same product
phoenixcontact: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-41752Reflected XSS vulnerability in pxc_portSfp.php31Monitor
- CVE-2025-41751Reflected XSS vulnerability in pxc_portCntr.php31Monitor
- CVE-2025-41748Reflected XSS vulnerability in pxc_Dot1xCfg.php31Monitor
- CVE-2025-41747Reflected XSS vulnerability in pxc_vlanIntfCfg.php31Monitor
- CVE-2025-41745Reflected XSS vulnerability in pxc_portCntr2.php28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Phoenix Contact FL NAT 2008 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL NAT 2208 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL NAT 2304-2GC-2SFP | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2005 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2008 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2008F | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2016 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2105 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2108 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2116 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2204-2TC-2SFX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2205 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2FX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2FX SM | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2FX SM ST | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2FX ST | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2SFX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206-2SFX PN | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2206C-2FX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2207-FX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2207-FX SM | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2208 | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2208 PN | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2208C | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2212-2TC-2SFX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2214-2FX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2214-2FX SM | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2214-2SFX | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2214-2SFX PN | 3.50 | Vendor (CNA) |
| Phoenix Contact FL SWITCH 2216 | 3.50 | Vendor (CNA) |
+39
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- D. Blagojevic, S. Dietz, F. Koroknai, T. WeberCyberDanubefinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-417470 days apartReflected XSS vulnerability in pxc_vlanIntfCfg.php31Monitor
- CVE-2025-417480 days apartReflected XSS vulnerability in pxc_Dot1xCfg.php31Monitor
- CVE-2025-417510 days apartReflected XSS vulnerability in pxc_portCntr.php31Monitor
- CVE-2025-417520 days apartReflected XSS vulnerability in pxc_portSfp.php31Monitor
- CVE-2025-417450 days apartReflected XSS vulnerability in pxc_portCntr2.php28Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- low · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- Low
Weakness class (CWE)
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
nvd-secondary
Root cause
User content is inserted into the page as HTML. The browser interprets the content as code rather than data.
The bug in code
The whole CWE-79 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
commentEl.innerHTML = comment.body;Fixed
commentEl.textContent = comment.body;Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.