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VulnerabilityPublished

CVE-2026-4313: C&F AdaptiveGRC · XSS or 'Cross-site Scripting'

Affects C&F AdaptiveGRCSource CVE Database V5

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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

CVSS 4.0 base score
2.4Low
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.499.113
Fixed in
  • 5.499.113
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.456.60
Fixed in
  • 5.456.60
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.455.87
Fixed in
  • 5.455.87
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.454.64
Fixed in
  • 5.454.64
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.453.110
Fixed in
  • 5.453.110
C&FAdaptiveGRCAffected
  • >=5.420.00 <5.448.116
Fixed in
  • 5.448.116

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.

References

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