CVE-2020-10420
Public exploit available. Not confirmed exploited in the wild yet. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
Steps
Written by AI from the record- Check whether your business runs PHPKB version 9 and whether staff use its administration area.
- No fixed version has been published; ask your PHPKB supplier or maintainer for a supported security update.
- Until an update is available, tell administrators not to open unexpected links to the PHPKB admin area and restrict admin access to trusted users and networks.
- Review administrator accounts and recent comment-management activity for anything unexpected.
What it is
From the CVE record
The way URIs are handled in admin/header.php in Chadha PHPKB Standard Multi-Language 9 allows Reflected XSS (injecting arbitrary web script or HTML) in admin/manage-comments.php by adding a question mark (?) followed by the payload.
In plain language
Written by AI from the recordPHPKB version 9 has a web-page scripting flaw; most small businesses should address it if they use its admin area, especially where administrators open links.
Reflected XSS in PHPKB Standard Multi-Language 9 arises from unsafe URI handling in admin/header.php when admin/manage-comments.php processes a crafted query string.
If you're affected
- Administrator session misuse
- Altered comment management
- Exposure of viewed admin data
- Administrative workflow disruption
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
2 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
0.6% chance of exploitation activity in the next 30 days, which ranks it in the 49th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
5 events over 2185 days, from the signal feeds we watch.
- Public exploit / PoCsource: other
- Record updated
- Publishedweakness classified, att&ck mapped
Affected products
And 1 more affected product. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Scored 4.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
Watch the software you run.
My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.
We'll flag the next CVE, public exploit or patch for Phpkb, not every advisory. This one: public exploit.
A free account adds
- The full version matrix and every affected product
- Exploit links, proofs of concept and Metasploit modules
- Email alerts for the products you watch
- The same data over REST API, MCP and CLI