CVE-2026-4313: C&F AdaptiveGRC · XSS or 'Cross-site Scripting'
Affects C&F AdaptiveGRCSource CVE Database V5
Not known to be exploited · CVSS 2.4 Low · fixed in 5.499.113 : update C&F AdaptiveGRC when convenient.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.499.113, 5.456.60, 5.455.87 +13
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| C&FAdaptiveGRC | Affected
| Fixed in
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| C&FAdaptiveGRC | Affected
| Fixed in
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| C&FAdaptiveGRC | Affected
| Fixed in
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| C&FAdaptiveGRC | Affected
| Fixed in
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| C&FAdaptiveGRC | Affected
| Fixed in
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| C&FAdaptiveGRC | Affected
| Fixed in
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AI-suggested
If you cannot patch yet, limit exposure by restricting authenticated user privileges where possible and monitoring for unusual administrative activity. Avoid relying solely on client-side protections, as the vulnerability stems from server-side input validation issues.
Description
C&F AdaptiveGRC versions before December 2025 are vulnerable to a stored Cross-site Scripting (XSS) flaw via text fields in forms. An authenticated attacker can inject arbitrary JavaScript by manipulating text field values in HTTP POST requests. This improper input neutralization can lead to execution of malicious scripts in the victim's browser, potentially allowing theft of administrator authentication tokens and unauthorized administrative actions. The vulnerability has a low CVSS 4.0 score of 2.4 and no known exploits in the wild.